The statistics ( U or U' ) used in the Mann-Whitney U test, measure _________.
A) the differences between the means of the two groups
B) the direction of the differences between pairs of scores
C) the power of the experiment
D) the separation between the two groups

Question

Quizplus · Accepted Answer

The statistics used in the Mann-Whitney U test measure the separation between the two groups, not the differences between the means or direction of the differences. The power of the experiment is represented by the statistical significance of the test, but is not directly measured by the U or U' statistics.

The Statistics ( U or U' ) Used in the Mann-Whitney