A researcher is comparing the performance of two groups on an exam using the Mann-Whitney U Test. What is the null hypothesis in this test?  A. There is no difference between the groups  B. The groups have equal means  C. The groups have equal variances  D. The distribution is normal

What is the null hypothesis in the Mann Whitney U test?The mean rating of two datasets are equal.The frequency of two datasets are equal.The frequency of two datasets are not equal.The mean ratings of two datasets are not equal.

In a Mann-Whitney U Test, what does it compare between two independent groups?  A. Means  B. Variances  C. Medians  D. Standard deviations

The Mann-Whitney U test is used to compare differences between two independent groups when the variable of interest is on the _______ scale.Answ

What is the primary purpose of the Mann-Whitney U Test?  A. To compare means of two independent groups  B. To examine the relationship between two continuous variables  C. To test the difference between two sample proportions  D. To compare distributions of two independent groups

Mann–Whitney nonparametric test was used to assess for any significance among the groups. Out of four activity sessions, the interventional group students performed well with p value being significant in three sessions when compared to the control group students who did not participate in the activity (Fig. 5).Fig. 5Graphical representation of the mean scores of Group I and Group II *p < 0.05, Mann–Whitney testThe result was not statistically significant (p value > 0.512) in the fourth session of Module 1 (Table 1).Table 1Evaluation between interventional and control group  Session Group I (n) Mean average scores Group II (n) Mean average scores P valueModule I 2 28 4.2 27 2.9 0.000a  4 16 6.1 11 6.6 0.512Module II 2 20 9.3 14 4.6 0.002a  4 27 6.0 22 5.1 0.032aOpen in a separate windowap < 0.05, Mann–Whitney test