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) It is equivalent to a parametric t-test of the difference between two means.
D) All of these.
E) None of these.

Question

Quizplus · Accepted Answer

The Wilcoxon rank-sum test is a nonparametric test for comparing two independent samples (A), it assesses whether their distributions differ (B), and it is often used as a nonparametric alternative to the t-test for comparing two means (C).

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