The Wilcoxon signed-rank sum test involves:
A) calculating the difference between the sample data for each matched pair. (Pairs with zero differences are eliminated from the test at this stage, and sample size, n, is reduced to the remaining number of pairs with nonzero differences)
B) ranking the absolute values of the (nonzero) differences from the smallest (rank= 1 ) to the largest (rank = n)
C) attaching to each rank the sign of the original difference corresponding to it, calculating the sum of these signed ranks, and designating it as the test statistic, T
D) all of these
E) none of these

Question

Quizplus · Accepted Answer

The Wilcoxon signed-rank sum test involves all of these steps. First, the difference between the sample data for each matched pair is calculated and pairs with zero differences are eliminated. Then, the absolute values of the remaining nonzero differences are ranked from smallest to largest. The sign of each rank is then designated based on the corresponding original difference, and the sum of these signed ranks is calculated as the test statistic, T.

The Wilcoxon Signed-Rank Sum Test Involves