In a Wilcoxon signed-rank test for matched pairs with n = 35, the rank sums of the positive and negative differences are 380 and 225, respectively. What, then, is the value of the standardized test statistic z?
A) 1.065
B) 1.206
C) 1.400
D) 1.689

Question

Quizplus · Accepted Answer

The standardized test statistic z is calculated as (W+ - W-) / sqrt(n(n+1)(2n+1)/6), where W+ and W- are the rank sums of the positive and negative differences, respectively, and n is the sample size. In this case, z = (380 - 225) / sqrt(35(35+1)(2*35+1)/6) = 1.065.

In a Wilcoxon Signed-Rank Test for Matched Pairs with N