In a Wilcoxon Signed Rank Sum Test for Matched Pairs

Multiple Choice

In a Wilcoxon signed rank sum test for matched pairs with n = 35, the rank sums of the positive and negative differences are 380 and 225, respectively. The value of the standardised test statistic z is:

A) 1.689.
B) 1.065.
C) 1.206.
D) 1.400.