Avoid p-values to be zero

[jaime-cespedes-sisniega]

Describe the workflow you want to enable

Avoid p-values to be zero be adding an additional argument to PermutationTestDistanceBased callback.

Describe your proposed solution

Add a boolean argument named conservative to PermutationTestDistanceBased callback. If true, p-values are computed using (b+1)/(m+1) formula which avoids zero value , otherwise p-values are computed using current formula b/m that can produce zero values.

Describe alternatives you've considered, if relevant

Another more advanced option would be to use equation (2) from Permutation P-values Should Never Be Zero:
Calculating Exact P-values When Permutations Are Randomly Drawn.

Additional context

No response