A researcher examined the relationship between gender and attitudes toward drinking alcohol.The researcher obtained the following data:
The expected rank sum for group 2 is _______________ group 1.
A)lower than
B)the same as
C)higher than
D)cannot be determined

Question

A researcher examined the relationship between gender and attitudes toward drinking alcohol.The researcher obtained the following data: 
The expected rank sum for group 2 is _______________ group 1.
A)lower than 
B)the same as 
C)higher than 
D)cannot be determined

Quizplus · Accepted Answer

According to the Wilcoxon Rank-Sum test, the expected rank sum for group 2 is higher than group 1 if the alternative hypothesis is that group 2 has higher attitudes toward drinking alcohol than group 1. This can be calculated by finding the expected rank sum for the larger group (in this case, group 2) using the formula: E(R2) = n1(n1+n2+1)/2 - E(R1). In this case, E(R2) = 14(14+15+1)/2 - 63 = 8, while E(R1) is simply the sum of the ranks for group 1, which is also 63. Therefore, the expected rank sum for group 2 is higher than group 1.

A Researcher Examined the Relationship Between Gender and Attitudes Toward