If we wish to determine whether there is evidence that the proportion of items of interest is the same in group 1 as in group 2, the appropriate test to use is
A) the Z test.
B) the X² test.
C) Both A and B.
D) Neither A nor B.

Question

Quizplus · Accepted Answer

The X² test is used to compare the proportions of items of interest in two or more groups. The Z test is used to compare the means of two groups. In this case, we are interested in comparing the proportions of items of interest in two groups, so the appropriate test to use is the X² test.

If We Wish to Determine Whether There Is Evidence That