The mean and the standard deviation of W for the nonparametric Wilcoxon rank sum test:
A)depend entirely upon the characteristics of the two samples.
B)depend entirely upon the characteristics of the two populations.
C)depend on the number of items that are being ranked, but not on the values themselves.
D)depend on the number of items that are being ranked, as well as the values themselves.

Question

Quizplus · Accepted Answer

The mean and the standard deviation of W for the nonparametric Wilcoxon rank sum test depend on the number of items that are being ranked, but not on the values themselves. This is because the test ranks the combined data from both groups and then examines the ranks, rather than directly comparing the values.

The Mean and the Standard Deviation of W for the Nonparametric