If a null hypothesis that states that two populations are identical is rejected using a nonparametric test, then it is safe to assume that
A) neither the means nor the variances are equal.
B) the means of the populations are not the same.
C) the variances of the populations are not the same.
D) We cannot be sure of the way in which the populations differ from each other.

Question

Quizplus · Accepted Answer

Nonparametric tests do not make assumptions about the means and variances of the populations. Therefore, rejecting the null hypothesis using a nonparametric test only indicates that there are differences between the populations, but it does not provide information about the nature or direction of those differences.

If a Null Hypothesis That States That Two Populations Are