To use the Wilcoxon Rank Sum Test as a test for location,you must assume that
A)the obtained data are either ranks or numerical measurements that will be converted to combined ranks.
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 the above.

Question

Quizplus · Accepted Answer

A) The Wilcoxon Rank Sum Test requires rank data or numerical measurements that can be converted to ranks. 
B) The assumptions of the test include random and independent sampling. 
C) The test assumes that the populations have similar shape and dispersion. Therefore, all of the above assumptions must be made in order to use the Wilcoxon Rank Sum Test as a test for location.

To Use the Wilcoxon Rank Sum Test as a Test