Suppose You Wanted to See If There Was a Difference

Multiple Choice

Suppose you wanted to see if there was a difference between the participants in the control group and the experimental group for the pre-test and the post-test data. What is the correct expression for the test results?

A) U = 506, z = -0.830, p = .406 and U = 269.5, z = -2.682, p = .007
B) U = -0.830, z = 394, p = .406 and U = -2.682, z = 269.5, p = .007
C) U = 0.406, z = -0.830, p = 394 and U = 0.007, z = -2.682, p = 269.5
D) U = 394, z = 0.406, p = -.830 and U = 269.5, z = 0.007, p = -2.682