When a Mann-Whitney U test is significant,we accept
A)our samples are independent.
B)our data represent the predicted difference between our conditions in the population.
C)our samples are not independent.
D)our data do not represent the predicted difference between our conditions in the population.

Question

Quizplus · Accepted Answer

A significant Mann-Whitney U test indicates that there is a significant difference between two conditions in the sample. Since the Mann-Whitney U test is a nonparametric test, it does not assume that the data are normally distributed or that the variances are equal. However, it does assume that the samples are independent, and a significant result suggests that the difference observed in the sample is likely to reflect a real difference in the population. Therefore, we can accept that our data represent the predicted difference between our conditions in the population, represented by choice B.

When a Mann-Whitney U Test Is Significant,we Accept