Two independent sets of data are collected, the first with 15 subjects and the second with 26 subjects. Mr. X is a subject in the first data set and is associated with a value of 66.
In the first set, 3 values are ranked behind 66 and 11 values are ranked ahead of it (with
Mr) X being the other data value). In the second set, 9 values are ranked behind 66 and
16 values are ranked ahead of it. What is Mr. X's rank in a Wilcoxon rank sum test?
A) 28
B) 27
C) 12
D) 11

Question

Quizplus · Accepted Answer

In the Wilcoxon rank sum test, ranks are assigned to all values from both data sets combined. Mr. X's value of 66 is ranked 12th in the first set and 10th in the second set. Therefore, Mr. X's combined rank is 12 + 16 = 28.

Two Independent Sets of Data Are Collected, the First with 15