diff --git a/your-code/.DS_Store b/your-code/.DS_Store
new file mode 100644
index 0000000..c2fa4b0
Binary files /dev/null and b/your-code/.DS_Store differ
diff --git a/your-code/data/Admission_Predict.csv b/your-code/data/Admission_Predict.csv
new file mode 100644
index 0000000..a7c1b13
--- /dev/null
+++ b/your-code/data/Admission_Predict.csv
@@ -0,0 +1,386 @@
+Serial No.,GRE Score,TOEFL Score,University Rating,SOP,LOR ,CGPA,Research,Chance of Admit 
+1,337,118,4,4.5,4.5,9.65,1,0.92
+2,316,104,3,3,3.5,8,1,0.72
+3,322,110,3,3.5,2.5,8.67,1,0.8
+4,314,103,2,2,3,8.21,0,0.65
+5,330,115,5,4.5,3,9.34,1,0.9
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+7,308,101,2,3,4,7.9,0,0.68
+8,302,102,1,2,1.5,8,0,0.5
+9,323,108,3,3.5,3,8.6,0,0.45
+10,327,111,4,4,4.5,9,1,0.84
+11,328,112,4,4,4.5,9.1,1,0.78
+12,307,109,3,4,3,8,1,0.62
+13,311,104,3,3.5,2,8.2,1,0.61
+14,314,105,3,3.5,2.5,8.3,0,0.54
+15,317,107,3,4,3,8.7,0,0.66
+16,319,106,3,4,3,8,1,0.65
+17,318,110,3,4,3,8.8,0,0.63
+18,303,102,3,3.5,3,8.5,0,0.62
+19,325,114,4,3,2,8.4,0,0.7
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+21,334,119,5,5,4.5,9.7,1,0.95
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+24,298,98,2,1.5,2.5,7.5,1,0.44
+25,295,93,1,2,2,7.2,0,0.46
+26,310,99,2,1.5,2,7.3,0,0.54
+27,300,97,2,3,3,8.1,1,0.65
+28,327,103,3,4,4,8.3,1,0.74
+29,338,118,4,3,4.5,9.4,1,0.91
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+35,304,105,1,3,1.5,7.5,0,0.52
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+40,332,117,4,4.5,4,9.1,0,0.87
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+46,327,111,4,3,4,8.4,1,0.78
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+49,334,116,4,4,3,8,1,0.78
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+54,298,99,2,4,2,7.6,0,0.46
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+56,311,104,2,2,2,8.3,0,0.42
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+384,312,103,3,3.5,4,8.78,0,0.67
+385,333,117,4,5,4,9.66,1,0.95
diff --git a/your-code/main.ipynb b/your-code/main.ipynb
index 7687137..b20d9cf 100644
--- a/your-code/main.ipynb
+++ b/your-code/main.ipynb
@@ -12,11 +12,13 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 82,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# import numpy and pandas"
+    "# import numpy and pandas\n",
+    "import pandas as pd\n",
+    "import numpy as np"
    ]
   },
   {
@@ -34,11 +36,217 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 83,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>2</td>\n",
+       "      <td>316</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>4</td>\n",
+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>5</td>\n",
+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR   CGPA  \\\n",
+       "0             1        337          118                  4  4.5   4.5  9.65   \n",
+       "1             2        316          104                  3  3.0   3.5  8.00   \n",
+       "2             3        322          110                  3  3.5   2.5  8.67   \n",
+       "3             4        314          103                  2  2.0   3.0  8.21   \n",
+       "4             5        330          115                  5  4.5   3.0  9.34   \n",
+       "..          ...        ...          ...                ...  ...   ...   ...   \n",
+       "380         381        324          110                  3  3.5   3.5  9.04   \n",
+       "381         382        325          107                  3  3.0   3.5  9.11   \n",
+       "382         383        330          116                  4  5.0   4.5  9.45   \n",
+       "383         384        312          103                  3  3.5   4.0  8.78   \n",
+       "384         385        333          117                  4  5.0   4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit   \n",
+       "0           1              0.92  \n",
+       "1           1              0.72  \n",
+       "2           1              0.80  \n",
+       "3           0              0.65  \n",
+       "4           1              0.90  \n",
+       "..        ...               ...  \n",
+       "380         1              0.82  \n",
+       "381         1              0.84  \n",
+       "382         1              0.91  \n",
+       "383         0              0.67  \n",
+       "384         1              0.95  \n",
+       "\n",
+       "[385 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 83,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "admissions = pd.read_csv('data/Admission_Predict.csv')"
+    "admissions = pd.read_csv('data/Admission_Predict.csv')\n",
+    "admissions"
    ]
   },
   {
@@ -50,9 +258,22 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 84,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "Index(['Serial No.', 'GRE Score', 'TOEFL Score', 'University Rating', 'SOP',\n",
+       "       'LOR', 'CGPA', 'Research', 'Chance of Admit'],\n",
+       "      dtype='object')"
+      ]
+     },
+     "execution_count": 84,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "admissions.columns = [col.strip() for col in admissions.columns]\n",
     "admissions.columns\n",
@@ -70,11 +291,217 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 85,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
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+       "\n",
+       "    .dataframe tbody tr th {\n",
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+       "\n",
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+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Serial No.</th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
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+       "      <td>337</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
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+       "      <td>316</td>\n",
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+       "      <td>3.0</td>\n",
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+       "      <td>8.00</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>3</td>\n",
+       "      <td>322</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
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+       "      <th>3</th>\n",
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+       "      <td>314</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
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+       "      <td>330</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
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+       "      <td>3.0</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
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+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>381</td>\n",
+       "      <td>324</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>382</td>\n",
+       "      <td>325</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>383</td>\n",
+       "      <td>330</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
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+       "      <td>4.5</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>384</td>\n",
+       "      <td>312</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>385</td>\n",
+       "      <td>333</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 9 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     Serial No.  GRE Score  TOEFL Score  University Rating  SOP  LOR  CGPA  \\\n",
+       "0             1        337          118                  4  4.5  4.5  9.65   \n",
+       "1             2        316          104                  3  3.0  3.5  8.00   \n",
+       "2             3        322          110                  3  3.5  2.5  8.67   \n",
+       "3             4        314          103                  2  2.0  3.0  8.21   \n",
+       "4             5        330          115                  5  4.5  3.0  9.34   \n",
+       "..          ...        ...          ...                ...  ...  ...   ...   \n",
+       "380         381        324          110                  3  3.5  3.5  9.04   \n",
+       "381         382        325          107                  3  3.0  3.5  9.11   \n",
+       "382         383        330          116                  4  5.0  4.5  9.45   \n",
+       "383         384        312          103                  3  3.5  4.0  8.78   \n",
+       "384         385        333          117                  4  5.0  4.0  9.66   \n",
+       "\n",
+       "     Research  Chance of Admit  \n",
+       "0           1             0.92  \n",
+       "1           1             0.72  \n",
+       "2           1             0.80  \n",
+       "3           0             0.65  \n",
+       "4           1             0.90  \n",
+       "..        ...              ...  \n",
+       "380         1             0.82  \n",
+       "381         1             0.84  \n",
+       "382         1             0.91  \n",
+       "383         0             0.67  \n",
+       "384         1             0.95  \n",
+       "\n",
+       "[385 rows x 9 columns]"
+      ]
+     },
+     "execution_count": 85,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions"
    ]
   },
   {
@@ -86,11 +513,35 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 86,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "<class 'pandas.core.frame.DataFrame'>\n",
+      "RangeIndex: 385 entries, 0 to 384\n",
+      "Data columns (total 9 columns):\n",
+      " #   Column             Non-Null Count  Dtype  \n",
+      "---  ------             --------------  -----  \n",
+      " 0   Serial No.         385 non-null    int64  \n",
+      " 1   GRE Score          385 non-null    int64  \n",
+      " 2   TOEFL Score        385 non-null    int64  \n",
+      " 3   University Rating  385 non-null    int64  \n",
+      " 4   SOP                385 non-null    float64\n",
+      " 5   LOR                385 non-null    float64\n",
+      " 6   CGPA               385 non-null    float64\n",
+      " 7   Research           385 non-null    int64  \n",
+      " 8   Chance of Admit    385 non-null    float64\n",
+      "dtypes: float64(4), int64(5)\n",
+      "memory usage: 27.2 KB\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions.info()"
    ]
   },
   {
@@ -102,11 +553,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 87,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions.set_index(\"Serial No.\", inplace=True)"
    ]
   },
   {
@@ -118,13 +570,67 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 88,
    "metadata": {
     "scrolled": true
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "False"
+      ]
+     },
+     "execution_count": 88,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "gre = admissions.set_index(\"GRE Score\")\n",
+    "gre.index.is_unique"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 89,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "False"
+      ]
+     },
+     "execution_count": 89,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "cgpa = admissions.set_index(\"CGPA\")\n",
+    "cgpa.index.is_unique"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 90,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "GRE и CGPA and are unique.\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "if not admissions.duplicated(subset=['GRE Score', 'CGPA']).any():\n",
+    "    print(\"GRE и CGPA and are unique.\")\n",
+    "else:\n",
+    "    print(\"GRE and CGPA are not unique.\")"
    ]
   },
   {
@@ -136,11 +642,206 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 91,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "      <th></th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>337</th>\n",
+       "      <th>9.65</th>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>316</th>\n",
+       "      <th>8.00</th>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>322</th>\n",
+       "      <th>8.67</th>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>314</th>\n",
+       "      <th>8.21</th>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>330</th>\n",
+       "      <th>9.34</th>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>324</th>\n",
+       "      <th>9.04</th>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>325</th>\n",
+       "      <th>9.11</th>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>330</th>\n",
+       "      <th>9.45</th>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>312</th>\n",
+       "      <th>8.78</th>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>333</th>\n",
+       "      <th>9.66</th>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 6 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                TOEFL Score  University Rating  SOP  LOR  Research  \\\n",
+       "GRE Score CGPA                                                       \n",
+       "337       9.65          118                  4  4.5  4.5         1   \n",
+       "316       8.00          104                  3  3.0  3.5         1   \n",
+       "322       8.67          110                  3  3.5  2.5         1   \n",
+       "314       8.21          103                  2  2.0  3.0         0   \n",
+       "330       9.34          115                  5  4.5  3.0         1   \n",
+       "...                     ...                ...  ...  ...       ...   \n",
+       "324       9.04          110                  3  3.5  3.5         1   \n",
+       "325       9.11          107                  3  3.0  3.5         1   \n",
+       "330       9.45          116                  4  5.0  4.5         1   \n",
+       "312       8.78          103                  3  3.5  4.0         0   \n",
+       "333       9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "                Chance of Admit  \n",
+       "GRE Score CGPA                   \n",
+       "337       9.65             0.92  \n",
+       "316       8.00             0.72  \n",
+       "322       8.67             0.80  \n",
+       "314       8.21             0.65  \n",
+       "330       9.34             0.90  \n",
+       "...                         ...  \n",
+       "324       9.04             0.82  \n",
+       "325       9.11             0.84  \n",
+       "330       9.45             0.91  \n",
+       "312       8.78             0.67  \n",
+       "333       9.66             0.95  \n",
+       "\n",
+       "[385 rows x 6 columns]"
+      ]
+     },
+     "execution_count": 91,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions.set_index(['GRE Score', 'CGPA'], inplace=True, drop=True)\n",
+    "admissions"
    ]
   },
   {
@@ -152,11 +853,206 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 92,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>316</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>322</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>314</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>312</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 8 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     GRE Score  CGPA  TOEFL Score  University Rating  SOP  LOR  Research  \\\n",
+       "0          337  9.65          118                  4  4.5  4.5         1   \n",
+       "1          316  8.00          104                  3  3.0  3.5         1   \n",
+       "2          322  8.67          110                  3  3.5  2.5         1   \n",
+       "3          314  8.21          103                  2  2.0  3.0         0   \n",
+       "4          330  9.34          115                  5  4.5  3.0         1   \n",
+       "..         ...   ...          ...                ...  ...  ...       ...   \n",
+       "380        324  9.04          110                  3  3.5  3.5         1   \n",
+       "381        325  9.11          107                  3  3.0  3.5         1   \n",
+       "382        330  9.45          116                  4  5.0  4.5         1   \n",
+       "383        312  8.78          103                  3  3.5  4.0         0   \n",
+       "384        333  9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "     Chance of Admit  \n",
+       "0               0.92  \n",
+       "1               0.72  \n",
+       "2               0.80  \n",
+       "3               0.65  \n",
+       "4               0.90  \n",
+       "..               ...  \n",
+       "380             0.82  \n",
+       "381             0.84  \n",
+       "382             0.91  \n",
+       "383             0.67  \n",
+       "384             0.95  \n",
+       "\n",
+       "[385 rows x 8 columns]"
+      ]
+     },
+     "execution_count": 92,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here\n",
+    "admissions.reset_index(inplace=True)\n",
+    "admissions"
    ]
   },
   {
@@ -170,11 +1066,205 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 93,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>10</th>\n",
+       "      <td>328</td>\n",
+       "      <td>9.10</td>\n",
+       "      <td>112</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.78</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>19</th>\n",
+       "      <td>328</td>\n",
+       "      <td>9.50</td>\n",
+       "      <td>116</td>\n",
+       "      <td>5</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.94</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>20</th>\n",
+       "      <td>334</td>\n",
+       "      <td>9.70</td>\n",
+       "      <td>119</td>\n",
+       "      <td>5</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>379</th>\n",
+       "      <td>329</td>\n",
+       "      <td>9.23</td>\n",
+       "      <td>111</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.89</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>101 rows × 8 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     GRE Score  CGPA  TOEFL Score  University Rating  SOP  LOR  Research  \\\n",
+       "0          337  9.65          118                  4  4.5  4.5         1   \n",
+       "4          330  9.34          115                  5  4.5  3.0         1   \n",
+       "10         328  9.10          112                  4  4.0  4.5         1   \n",
+       "19         328  9.50          116                  5  5.0  5.0         1   \n",
+       "20         334  9.70          119                  5  5.0  4.5         1   \n",
+       "..         ...   ...          ...                ...  ...  ...       ...   \n",
+       "379        329  9.23          111                  4  4.5  4.0         1   \n",
+       "380        324  9.04          110                  3  3.5  3.5         1   \n",
+       "381        325  9.11          107                  3  3.0  3.5         1   \n",
+       "382        330  9.45          116                  4  5.0  4.5         1   \n",
+       "384        333  9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "     Chance of Admit  \n",
+       "0               0.92  \n",
+       "4               0.90  \n",
+       "10              0.78  \n",
+       "19              0.94  \n",
+       "20              0.95  \n",
+       "..               ...  \n",
+       "379             0.89  \n",
+       "380             0.82  \n",
+       "381             0.84  \n",
+       "382             0.91  \n",
+       "384             0.95  \n",
+       "\n",
+       "[101 rows x 8 columns]"
+      ]
+     },
+     "execution_count": 93,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions[((admissions[\"CGPA\"] > 9) & (admissions[\"Research\"] == 1))]"
    ]
   },
   {
@@ -186,11 +1276,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 94,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "np.float64(0.8019999999999999)"
+      ]
+     },
+     "execution_count": 94,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions[((admissions[\"CGPA\"] > 9) & (admissions[\"SOP\"] < 3.5))][\"Chance of Admit\"].mean()"
    ]
   },
   {
@@ -208,7 +1310,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": 95,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -218,7 +1320,10 @@
     "    and returns a standardized column by subtracting the column's mean\n",
     "    and dividing by the column's standard deviation.\n",
     "    \"\"\"\n",
-    "   \n",
+    "    mean_col = np.mean(col)\n",
+    "    std = np.std(col)\n",
+    "    standart_col = (col - mean_col) / std\n",
+    "    return standart_col\n",
     "   # Your code here:"
    ]
   },
@@ -231,11 +1336,246 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 96,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "      <th>CGPA_std</th>\n",
+       "      <th>GRE_std</th>\n",
+       "      <th>LOR_std</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "      <td>1.750174</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1.193197</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>316</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "      <td>-0.992501</td>\n",
+       "      <td>-0.063450</td>\n",
+       "      <td>0.076840</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>322</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0.456297</td>\n",
+       "      <td>-1.039517</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>314</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "      <td>-0.643433</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>-0.481338</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "      <td>1.234884</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>-0.481338</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0.629546</td>\n",
+       "      <td>0.076840</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "      <td>0.852571</td>\n",
+       "      <td>0.716170</td>\n",
+       "      <td>0.076840</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "      <td>1.417729</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1.193197</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>312</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "      <td>0.304036</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0.635019</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1.409165</td>\n",
+       "      <td>0.635019</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 11 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     GRE Score  CGPA  TOEFL Score  University Rating  SOP  LOR  Research  \\\n",
+       "0          337  9.65          118                  4  4.5  4.5         1   \n",
+       "1          316  8.00          104                  3  3.0  3.5         1   \n",
+       "2          322  8.67          110                  3  3.5  2.5         1   \n",
+       "3          314  8.21          103                  2  2.0  3.0         0   \n",
+       "4          330  9.34          115                  5  4.5  3.0         1   \n",
+       "..         ...   ...          ...                ...  ...  ...       ...   \n",
+       "380        324  9.04          110                  3  3.5  3.5         1   \n",
+       "381        325  9.11          107                  3  3.0  3.5         1   \n",
+       "382        330  9.45          116                  4  5.0  4.5         1   \n",
+       "383        312  8.78          103                  3  3.5  4.0         0   \n",
+       "384        333  9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "     Chance of Admit  CGPA_std   GRE_std   LOR_std  \n",
+       "0               0.92  1.750174  1.755663  1.193197  \n",
+       "1               0.72 -0.992501 -0.063450  0.076840  \n",
+       "2               0.80  0.121191  0.456297 -1.039517  \n",
+       "3               0.65 -0.643433 -0.236698 -0.481338  \n",
+       "4               0.90  1.234884  1.149292 -0.481338  \n",
+       "..               ...       ...       ...       ...  \n",
+       "380             0.82  0.736216  0.629546  0.076840  \n",
+       "381             0.84  0.852571  0.716170  0.076840  \n",
+       "382             0.91  1.417729  1.149292  1.193197  \n",
+       "383             0.67  0.304036 -0.409947  0.635019  \n",
+       "384             0.95  1.766796  1.409165  0.635019  \n",
+       "\n",
+       "[385 rows x 11 columns]"
+      ]
+     },
+     "execution_count": 96,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions[\"CGPA_std\"] = standardize(admissions[\"CGPA\"])\n",
+    "admissions[\"GRE_std\"] = standardize(admissions[\"GRE Score\"])\n",
+    "admissions[\"LOR_std\"] = standardize(admissions[\"LOR\"])\n",
+    "\n",
+    "\n",
+    "admissions"
    ]
   },
   {
@@ -247,7 +1587,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 14,
+   "execution_count": 97,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -257,9 +1597,404 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 98,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "['GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std',\n",
+       " 'GRE_std',\n",
+       " 'LOR_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'CGPA_std',\n",
+       " 'LOR_std',\n",
+       " 'LOR_std',\n",
+       " 'GRE_std',\n",
+       " 'CGPA_std']"
+      ]
+     },
+     "execution_count": 98,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "# Run this code:\n",
     "\n",
@@ -278,11 +2013,255 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 99,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "      <th>CGPA_std</th>\n",
+       "      <th>GRE_std</th>\n",
+       "      <th>LOR_std</th>\n",
+       "      <th>deciding_column</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "      <td>1.750174</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.755663</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>316</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "      <td>-0.992501</td>\n",
+       "      <td>-0.063450</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>322</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0.456297</td>\n",
+       "      <td>-1.039517</td>\n",
+       "      <td>0.121191</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>314</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "      <td>-0.643433</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>-0.236698</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "      <td>1.234884</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>1.149292</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0.629546</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.736216</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "      <td>0.852571</td>\n",
+       "      <td>0.716170</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "      <td>1.417729</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.193197</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>312</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "      <td>0.304036</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>-0.409947</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1.409165</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>1.766796</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 12 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     GRE Score  CGPA  TOEFL Score  University Rating  SOP  LOR  Research  \\\n",
+       "0          337  9.65          118                  4  4.5  4.5         1   \n",
+       "1          316  8.00          104                  3  3.0  3.5         1   \n",
+       "2          322  8.67          110                  3  3.5  2.5         1   \n",
+       "3          314  8.21          103                  2  2.0  3.0         0   \n",
+       "4          330  9.34          115                  5  4.5  3.0         1   \n",
+       "..         ...   ...          ...                ...  ...  ...       ...   \n",
+       "380        324  9.04          110                  3  3.5  3.5         1   \n",
+       "381        325  9.11          107                  3  3.0  3.5         1   \n",
+       "382        330  9.45          116                  4  5.0  4.5         1   \n",
+       "383        312  8.78          103                  3  3.5  4.0         0   \n",
+       "384        333  9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "     Chance of Admit  CGPA_std   GRE_std   LOR_std  deciding_column  \n",
+       "0               0.92  1.750174  1.755663  1.193197         1.755663  \n",
+       "1               0.72 -0.992501 -0.063450  0.076840         0.076840  \n",
+       "2               0.80  0.121191  0.456297 -1.039517         0.121191  \n",
+       "3               0.65 -0.643433 -0.236698 -0.481338        -0.236698  \n",
+       "4               0.90  1.234884  1.149292 -0.481338         1.149292  \n",
+       "..               ...       ...       ...       ...              ...  \n",
+       "380             0.82  0.736216  0.629546  0.076840         0.736216  \n",
+       "381             0.84  0.852571  0.716170  0.076840         0.076840  \n",
+       "382             0.91  1.417729  1.149292  1.193197         1.193197  \n",
+       "383             0.67  0.304036 -0.409947  0.635019        -0.409947  \n",
+       "384             0.95  1.766796  1.409165  0.635019         1.766796  \n",
+       "\n",
+       "[385 rows x 12 columns]"
+      ]
+     },
+     "execution_count": 99,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions[\"deciding_column\"] = admissions.to_numpy()[np.arange(admissions.shape[0]), [std_columns.index(col)+8 for col in decision_choice]]\n",
+    "\n",
+    "admissions"
    ]
   },
   {
@@ -294,11 +2273,266 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 17,
+   "execution_count": 100,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>GRE Score</th>\n",
+       "      <th>CGPA</th>\n",
+       "      <th>TOEFL Score</th>\n",
+       "      <th>University Rating</th>\n",
+       "      <th>SOP</th>\n",
+       "      <th>LOR</th>\n",
+       "      <th>Research</th>\n",
+       "      <th>Chance of Admit</th>\n",
+       "      <th>CGPA_std</th>\n",
+       "      <th>GRE_std</th>\n",
+       "      <th>LOR_std</th>\n",
+       "      <th>deciding_column</th>\n",
+       "      <th>decision</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "      <td>1.750174</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>316</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "      <td>-0.992501</td>\n",
+       "      <td>-0.063450</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>322</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0.456297</td>\n",
+       "      <td>-1.039517</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>314</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "      <td>-0.643433</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "      <td>1.234884</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0.629546</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "      <td>0.852571</td>\n",
+       "      <td>0.716170</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "      <td>1.417729</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>312</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "      <td>0.304036</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1.409165</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 13 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     GRE Score  CGPA  TOEFL Score  University Rating  SOP  LOR  Research  \\\n",
+       "0          337  9.65          118                  4  4.5  4.5         1   \n",
+       "1          316  8.00          104                  3  3.0  3.5         1   \n",
+       "2          322  8.67          110                  3  3.5  2.5         1   \n",
+       "3          314  8.21          103                  2  2.0  3.0         0   \n",
+       "4          330  9.34          115                  5  4.5  3.0         1   \n",
+       "..         ...   ...          ...                ...  ...  ...       ...   \n",
+       "380        324  9.04          110                  3  3.5  3.5         1   \n",
+       "381        325  9.11          107                  3  3.0  3.5         1   \n",
+       "382        330  9.45          116                  4  5.0  4.5         1   \n",
+       "383        312  8.78          103                  3  3.5  4.0         0   \n",
+       "384        333  9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "     Chance of Admit  CGPA_std   GRE_std   LOR_std  deciding_column  decision  \n",
+       "0               0.92  1.750174  1.755663  1.193197         1.755663         1  \n",
+       "1               0.72 -0.992501 -0.063450  0.076840         0.076840         0  \n",
+       "2               0.80  0.121191  0.456297 -1.039517         0.121191         0  \n",
+       "3               0.65 -0.643433 -0.236698 -0.481338        -0.236698         0  \n",
+       "4               0.90  1.234884  1.149292 -0.481338         1.149292         1  \n",
+       "..               ...       ...       ...       ...              ...       ...  \n",
+       "380             0.82  0.736216  0.629546  0.076840         0.736216         0  \n",
+       "381             0.84  0.852571  0.716170  0.076840         0.076840         0  \n",
+       "382             0.91  1.417729  1.149292  1.193197         1.193197         1  \n",
+       "383             0.67  0.304036 -0.409947  0.635019        -0.409947         0  \n",
+       "384             0.95  1.766796  1.409165  0.635019         1.766796         1  \n",
+       "\n",
+       "[385 rows x 13 columns]"
+      ]
+     },
+     "execution_count": 100,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions[\"decision\"] = (admissions[\"deciding_column\"] > 0.8).astype(int)\n",
+    "admissions"
    ]
   },
   {
@@ -310,11 +2544,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 101,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "np.int64(96)"
+      ]
+     },
+     "execution_count": 101,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions[\"decision\"].sum()"
    ]
   },
   {
@@ -330,11 +2576,266 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 102,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>gre_score</th>\n",
+       "      <th>cgpa</th>\n",
+       "      <th>toefl_score</th>\n",
+       "      <th>university_rating</th>\n",
+       "      <th>sop</th>\n",
+       "      <th>lor</th>\n",
+       "      <th>research</th>\n",
+       "      <th>chance_of_admit</th>\n",
+       "      <th>cgpa_std</th>\n",
+       "      <th>gre_std</th>\n",
+       "      <th>lor_std</th>\n",
+       "      <th>deciding_column</th>\n",
+       "      <th>decision</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "      <td>1.750174</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>316</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "      <td>-0.992501</td>\n",
+       "      <td>-0.063450</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>322</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0.456297</td>\n",
+       "      <td>-1.039517</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>314</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "      <td>-0.643433</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "      <td>1.234884</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
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+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0.629546</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "      <td>0.852571</td>\n",
+       "      <td>0.716170</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "      <td>1.417729</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>312</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "      <td>0.304036</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1.409165</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 13 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     gre_score  cgpa  toefl_score  university_rating  sop  lor  research  \\\n",
+       "0          337  9.65          118                  4  4.5  4.5         1   \n",
+       "1          316  8.00          104                  3  3.0  3.5         1   \n",
+       "2          322  8.67          110                  3  3.5  2.5         1   \n",
+       "3          314  8.21          103                  2  2.0  3.0         0   \n",
+       "4          330  9.34          115                  5  4.5  3.0         1   \n",
+       "..         ...   ...          ...                ...  ...  ...       ...   \n",
+       "380        324  9.04          110                  3  3.5  3.5         1   \n",
+       "381        325  9.11          107                  3  3.0  3.5         1   \n",
+       "382        330  9.45          116                  4  5.0  4.5         1   \n",
+       "383        312  8.78          103                  3  3.5  4.0         0   \n",
+       "384        333  9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "     chance_of_admit  cgpa_std   gre_std   lor_std  deciding_column  decision  \n",
+       "0               0.92  1.750174  1.755663  1.193197         1.755663         1  \n",
+       "1               0.72 -0.992501 -0.063450  0.076840         0.076840         0  \n",
+       "2               0.80  0.121191  0.456297 -1.039517         0.121191         0  \n",
+       "3               0.65 -0.643433 -0.236698 -0.481338        -0.236698         0  \n",
+       "4               0.90  1.234884  1.149292 -0.481338         1.149292         1  \n",
+       "..               ...       ...       ...       ...              ...       ...  \n",
+       "380             0.82  0.736216  0.629546  0.076840         0.736216         0  \n",
+       "381             0.84  0.852571  0.716170  0.076840         0.076840         0  \n",
+       "382             0.91  1.417729  1.149292  1.193197         1.193197         1  \n",
+       "383             0.67  0.304036 -0.409947  0.635019        -0.409947         0  \n",
+       "384             0.95  1.766796  1.409165  0.635019         1.766796         1  \n",
+       "\n",
+       "[385 rows x 13 columns]"
+      ]
+     },
+     "execution_count": 102,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "# Your code here:\n",
+    "admissions.columns = [col.strip().lower().replace(\" \", \"_\") for col in admissions.columns]\n",
+    "admissions"
    ]
   },
   {
@@ -346,12 +2847,599 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 20,
+   "execution_count": 104,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
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+       "\n",
+       "    .dataframe tbody tr th {\n",
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+       "\n",
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+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>gre_score</th>\n",
+       "      <th>cgpa</th>\n",
+       "      <th>toefl_score</th>\n",
+       "      <th>university_rating</th>\n",
+       "      <th>sop</th>\n",
+       "      <th>lor</th>\n",
+       "      <th>research</th>\n",
+       "      <th>chance_of_admit</th>\n",
+       "      <th>cgpa_std</th>\n",
+       "      <th>gre_std</th>\n",
+       "      <th>lor_std</th>\n",
+       "      <th>deciding_column</th>\n",
+       "      <th>decision</th>\n",
+       "      <th>adjusted_gre</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "      <td>1.750174</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>316</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "      <td>-0.992501</td>\n",
+       "      <td>-0.063450</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0</td>\n",
+       "      <td>316</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>322</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0.456297</td>\n",
+       "      <td>-1.039517</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0</td>\n",
+       "      <td>322</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>314</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "      <td>-0.643433</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>0</td>\n",
+       "      <td>314</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "      <td>1.234884</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1</td>\n",
+       "      <td>340</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0.629546</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0</td>\n",
+       "      <td>324</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "      <td>0.852571</td>\n",
+       "      <td>0.716170</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0</td>\n",
+       "      <td>325</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "      <td>1.417729</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1</td>\n",
+       "      <td>330</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>312</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "      <td>0.304036</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0</td>\n",
+       "      <td>312</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1.409165</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1</td>\n",
+       "      <td>333</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 14 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     gre_score  cgpa  toefl_score  university_rating  sop  lor  research  \\\n",
+       "0          337  9.65          118                  4  4.5  4.5         1   \n",
+       "1          316  8.00          104                  3  3.0  3.5         1   \n",
+       "2          322  8.67          110                  3  3.5  2.5         1   \n",
+       "3          314  8.21          103                  2  2.0  3.0         0   \n",
+       "4          330  9.34          115                  5  4.5  3.0         1   \n",
+       "..         ...   ...          ...                ...  ...  ...       ...   \n",
+       "380        324  9.04          110                  3  3.5  3.5         1   \n",
+       "381        325  9.11          107                  3  3.0  3.5         1   \n",
+       "382        330  9.45          116                  4  5.0  4.5         1   \n",
+       "383        312  8.78          103                  3  3.5  4.0         0   \n",
+       "384        333  9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "     chance_of_admit  cgpa_std   gre_std   lor_std  deciding_column  decision  \\\n",
+       "0               0.92  1.750174  1.755663  1.193197         1.755663         1   \n",
+       "1               0.72 -0.992501 -0.063450  0.076840         0.076840         0   \n",
+       "2               0.80  0.121191  0.456297 -1.039517         0.121191         0   \n",
+       "3               0.65 -0.643433 -0.236698 -0.481338        -0.236698         0   \n",
+       "4               0.90  1.234884  1.149292 -0.481338         1.149292         1   \n",
+       "..               ...       ...       ...       ...              ...       ...   \n",
+       "380             0.82  0.736216  0.629546  0.076840         0.736216         0   \n",
+       "381             0.84  0.852571  0.716170  0.076840         0.076840         0   \n",
+       "382             0.91  1.417729  1.149292  1.193197         1.193197         1   \n",
+       "383             0.67  0.304036 -0.409947  0.635019        -0.409947         0   \n",
+       "384             0.95  1.766796  1.409165  0.635019         1.766796         1   \n",
+       "\n",
+       "     adjusted_gre  \n",
+       "0             337  \n",
+       "1             316  \n",
+       "2             322  \n",
+       "3             314  \n",
+       "4             340  \n",
+       "..            ...  \n",
+       "380           324  \n",
+       "381           325  \n",
+       "382           330  \n",
+       "383           312  \n",
+       "384           333  \n",
+       "\n",
+       "[385 rows x 14 columns]"
+      ]
+     },
+     "execution_count": 104,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "admissions[\"adjusted_gre\"] = (admissions[\"gre_score\"] + (admissions[\"university_rating\"] > 4).astype(int) * 10)\n",
+    "admissions"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 107,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>gre_score</th>\n",
+       "      <th>cgpa</th>\n",
+       "      <th>toefl_score</th>\n",
+       "      <th>university_rating</th>\n",
+       "      <th>sop</th>\n",
+       "      <th>lor</th>\n",
+       "      <th>research</th>\n",
+       "      <th>chance_of_admit</th>\n",
+       "      <th>cgpa_std</th>\n",
+       "      <th>gre_std</th>\n",
+       "      <th>lor_std</th>\n",
+       "      <th>deciding_column</th>\n",
+       "      <th>decision</th>\n",
+       "      <th>adjusted_gre</th>\n",
+       "      <th>adjusted_gre_binned</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>337</td>\n",
+       "      <td>9.65</td>\n",
+       "      <td>118</td>\n",
+       "      <td>4</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.92</td>\n",
+       "      <td>1.750174</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.755663</td>\n",
+       "      <td>1</td>\n",
+       "      <td>337</td>\n",
+       "      <td>Very High</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>316</td>\n",
+       "      <td>8.00</td>\n",
+       "      <td>104</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.72</td>\n",
+       "      <td>-0.992501</td>\n",
+       "      <td>-0.063450</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0</td>\n",
+       "      <td>316</td>\n",
+       "      <td>Medium</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>322</td>\n",
+       "      <td>8.67</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>2.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.80</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0.456297</td>\n",
+       "      <td>-1.039517</td>\n",
+       "      <td>0.121191</td>\n",
+       "      <td>0</td>\n",
+       "      <td>322</td>\n",
+       "      <td>High</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>314</td>\n",
+       "      <td>8.21</td>\n",
+       "      <td>103</td>\n",
+       "      <td>2</td>\n",
+       "      <td>2.0</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.65</td>\n",
+       "      <td>-0.643433</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>-0.236698</td>\n",
+       "      <td>0</td>\n",
+       "      <td>314</td>\n",
+       "      <td>Medium</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.34</td>\n",
+       "      <td>115</td>\n",
+       "      <td>5</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.90</td>\n",
+       "      <td>1.234884</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>-0.481338</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1</td>\n",
+       "      <td>340</td>\n",
+       "      <td>Very High</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>...</th>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "      <td>...</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>380</th>\n",
+       "      <td>324</td>\n",
+       "      <td>9.04</td>\n",
+       "      <td>110</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.82</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0.629546</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.736216</td>\n",
+       "      <td>0</td>\n",
+       "      <td>324</td>\n",
+       "      <td>High</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>381</th>\n",
+       "      <td>325</td>\n",
+       "      <td>9.11</td>\n",
+       "      <td>107</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.0</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.84</td>\n",
+       "      <td>0.852571</td>\n",
+       "      <td>0.716170</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0.076840</td>\n",
+       "      <td>0</td>\n",
+       "      <td>325</td>\n",
+       "      <td>High</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>382</th>\n",
+       "      <td>330</td>\n",
+       "      <td>9.45</td>\n",
+       "      <td>116</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.91</td>\n",
+       "      <td>1.417729</td>\n",
+       "      <td>1.149292</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1.193197</td>\n",
+       "      <td>1</td>\n",
+       "      <td>330</td>\n",
+       "      <td>High</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>383</th>\n",
+       "      <td>312</td>\n",
+       "      <td>8.78</td>\n",
+       "      <td>103</td>\n",
+       "      <td>3</td>\n",
+       "      <td>3.5</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>0</td>\n",
+       "      <td>0.67</td>\n",
+       "      <td>0.304036</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>-0.409947</td>\n",
+       "      <td>0</td>\n",
+       "      <td>312</td>\n",
+       "      <td>Medium</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>384</th>\n",
+       "      <td>333</td>\n",
+       "      <td>9.66</td>\n",
+       "      <td>117</td>\n",
+       "      <td>4</td>\n",
+       "      <td>5.0</td>\n",
+       "      <td>4.0</td>\n",
+       "      <td>1</td>\n",
+       "      <td>0.95</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1.409165</td>\n",
+       "      <td>0.635019</td>\n",
+       "      <td>1.766796</td>\n",
+       "      <td>1</td>\n",
+       "      <td>333</td>\n",
+       "      <td>High</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "<p>385 rows × 15 columns</p>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "     gre_score  cgpa  toefl_score  university_rating  sop  lor  research  \\\n",
+       "0          337  9.65          118                  4  4.5  4.5         1   \n",
+       "1          316  8.00          104                  3  3.0  3.5         1   \n",
+       "2          322  8.67          110                  3  3.5  2.5         1   \n",
+       "3          314  8.21          103                  2  2.0  3.0         0   \n",
+       "4          330  9.34          115                  5  4.5  3.0         1   \n",
+       "..         ...   ...          ...                ...  ...  ...       ...   \n",
+       "380        324  9.04          110                  3  3.5  3.5         1   \n",
+       "381        325  9.11          107                  3  3.0  3.5         1   \n",
+       "382        330  9.45          116                  4  5.0  4.5         1   \n",
+       "383        312  8.78          103                  3  3.5  4.0         0   \n",
+       "384        333  9.66          117                  4  5.0  4.0         1   \n",
+       "\n",
+       "     chance_of_admit  cgpa_std   gre_std   lor_std  deciding_column  decision  \\\n",
+       "0               0.92  1.750174  1.755663  1.193197         1.755663         1   \n",
+       "1               0.72 -0.992501 -0.063450  0.076840         0.076840         0   \n",
+       "2               0.80  0.121191  0.456297 -1.039517         0.121191         0   \n",
+       "3               0.65 -0.643433 -0.236698 -0.481338        -0.236698         0   \n",
+       "4               0.90  1.234884  1.149292 -0.481338         1.149292         1   \n",
+       "..               ...       ...       ...       ...              ...       ...   \n",
+       "380             0.82  0.736216  0.629546  0.076840         0.736216         0   \n",
+       "381             0.84  0.852571  0.716170  0.076840         0.076840         0   \n",
+       "382             0.91  1.417729  1.149292  1.193197         1.193197         1   \n",
+       "383             0.67  0.304036 -0.409947  0.635019        -0.409947         0   \n",
+       "384             0.95  1.766796  1.409165  0.635019         1.766796         1   \n",
+       "\n",
+       "     adjusted_gre adjusted_gre_binned  \n",
+       "0             337           Very High  \n",
+       "1             316              Medium  \n",
+       "2             322                High  \n",
+       "3             314              Medium  \n",
+       "4             340           Very High  \n",
+       "..            ...                 ...  \n",
+       "380           324                High  \n",
+       "381           325                High  \n",
+       "382           330                High  \n",
+       "383           312              Medium  \n",
+       "384           333                High  \n",
+       "\n",
+       "[385 rows x 15 columns]"
+      ]
+     },
+     "execution_count": 107,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:"
+    "admissions[\"adjusted_gre_binned\"] = pd.cut(admissions[\"adjusted_gre\"], bins=4, labels=[\"Low\", \"Medium\", \"High\", \"Very High\"])\n",
+    "admissions\n"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -370,7 +3458,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.4"
+   "version": "3.9.6"
   }
  },
  "nbformat": 4,