To Use the Wilcoxon Rank Sum Test as a Test

Multiple Choice

To use the Wilcoxon Rank Sum Test as a test for location, we must assume that:

A) the obtained data are either ordinal or interval where the normality requirement necessary to perform the equal-variances t-test ofis unsatisfied
B) both samples are randomly and independently drawn from their respective populations
C) both underlying populations from which the samples were drawn are equivalent in shape and dispersion
D) all of these
E) none of these