The Mann-Whitney U test can be used to compare differences between groups when:
A) There are a small number of participants
B) Sample sizes are not equal
C) Data are ranked or interval level
D) All of the above

Question

Quizplus · Accepted Answer

The Mann-Whitney U test is a non-parametric test that can be used when there are a small number of participants, when sample sizes between groups are unequal, and when the data are at least ordinal (ranked) or interval level, making all the options correct.

The Mann-Whitney U Test Can Be Used to Compare Differences