update assignment

[AnaKanzaTariq]

What changes are you trying to make? (e.g. Adding or removing code, refactoring existing code, adding reports)
added explanations

What did you learn from the changes you have made?
how to design a survey

Was there another approach you were thinking about making? If so, what approach(es) were you thinking of? no
Were there any challenges? If so, what issue(s) did you face? How did you overcome it?
imagining exclusions, or research limitations

How were these changes tested?
not tested

A reference to a related issue in your repository (if applicable)
Checklist
[y] I can confirm that my changes are working as intended

[anjali-deshpande-hub]

Good!

Some of the corrections/missing components:
Part A Sampling strategy is missing. stratified random sampling strategy to ensure that different age groups are proportionately represented

Part B looks excellent. The assignment was asking for 2018 instead of 2023 survey. That's ok :-)