A nonparametric method that is equivalent to the Wilcoxon rank sum test is the:
A)Wilcoxon signed rank test.
B)Sign test.
C)Spearman rank correlation test.
D)Mann-Whitney U test.

Question

Quizplus · Accepted Answer

The Mann-Whitney U test is a nonparametric method that is equivalent to the Wilcoxon rank sum test. Both tests compare two independent samples to determine if one has significantly higher (or lower) values than the other. The other options listed (Wilcoxon signed rank test, sign test, and Spearman rank correlation test) are all different nonparametric methods that serve different purposes and are not equivalent to the Wilcoxon rank sum test.

A Nonparametric Method That Is Equivalent to the Wilcoxon Rank