The assumptions of the Mann-Whitney U test are that:
A) the data are ordinal and randomly distributed.
B) participants are randomly selected and the population is symmetric.
C) the data are ordinal, the participants are randomly selected, and ideally no ranks are tied.
D) the data are ordinal, the participants are randomly selected, and the population is symmetric.

Question

Quizplus · Accepted Answer

The Mann-Whitney U test assumes that the data are ordinal, the participants are randomly selected, and ideally no ranks are tied. It does not assume that the population is symmetric. Therefore, choice C is the best option.

The Assumptions of the Mann-Whitney U Test Are That