A Mann-Whitney U test is used to compare two groups of 18 on ranked athleticism.Which of these U test statistics would be considered significant?
A) 100
B) 115
C) 121
D) 91

Question

Quizplus · Accepted Answer

The significance of a Mann-Whitney U test statistic depends on the sample size and the chosen significance level (usually α = 0.05). Without specific critical values provided, we typically look for the lowest U value because the Mann-Whitney U test assesses whether one group tends to have higher ranks than the other. Lower U values suggest a significant difference between groups. Among the given options, 91 is the lowest, indicating it is the most likely to be considered significant.

A Mann-Whitney U Test Is Used to Compare Two Groups