The Mann-Whitney U test is used as a nonparametric alternative to which parametric test?
A) one-sample t test
B) two-independent-sample t test
C) related-samples t test
D) one-sample t test and related-samples t test

Question

Quizplus · Accepted Answer

The Mann-Whitney U test is a nonparametric alternative to the two-independent-sample t test, which is used to compare the means of two independent samples. The Mann-Whitney U test can be used when the assumptions of the t test are not met, such as when the data are not normally distributed or when the sample sizes are small. The other options (one-sample t test, related-samples t test, and the combination of one-sample t test and related-samples t test) are not related to the comparison of two independent samples, and therefore are not alternatives to the two-independent-sample t test.

The Mann-Whitney U Test Is Used as a Nonparametric Alternative