Which of the following correctly describes the Wilcoxon rank-sum test?
A) It is a nonparametric test based on two independent simple random samples.
B) It is designed to determine whether the relative frequency distributions of two statistical populations of continuous values are identical to or different from one another.
C) The Wilcoxon rank-sum test is equivalent to a parametric t-test of the difference between two independent means.
D) All of these.
E) None of these

Question

Quizplus · Accepted Answer

The Wilcoxon rank-sum test is a nonparametric test that compares two independent samples to determine if they come from the same distribution, making it an alternative to the parametric t-test when the data do not meet the assumptions required for the t-test. It assesses whether the relative frequency distributions of two populations are identical or different, making all the given options correct descriptions of the test.

Which of the Following Correctly Describes the Wilcoxon Rank-Sum Test