Under these circumstances, nonparametric tests can be very useful. Q6-2. The Wilcoxon-Mann-Whitney test is described as a non-parametric test for comparing two groups. A. What null hypothesis does this test actually evaluate? B. What are the underlying assumptions of a Wilcoxon-Mann-Whitney test? Q6-3. If the assumptions are met, test the null hypothesis of no difference in body weight between male and female fulmars using a Wilcoxon test HINT. Based on this outcome, what are your conclusions?