Under What Condition Is a Permutation Test for Comparing Two

Multiple Choice

Under what condition is a permutation test for comparing two populations valid?

A) The populations have the same mean under the null hypothesis.
B) The populations are identical under the null hypothesis.
C) The two populations have the same standard deviation under both the null and alternative hypotheses.
D) Under all circumstances-the permutation test does not require any particular assumptions and hence is very powerful.