If you wish to determine whether there is evidence that the proportion of items of interest is higher in group 1 than in group 2,the appropriate test to use is
A)the Z test for the difference between two proportions.
B)the F test for the ratio of variances.
C)the pooled-variance t test for the difference between two proportions.
D)the F test for the difference between two proportions.

Question

Quizplus · Accepted Answer

The Z test for the difference between two proportions is the appropriate test for determining whether there is evidence that the proportion of items of interest is higher in group 1 than in group 2. This test compares the difference between two sample proportions to the standard error of the difference, and is appropriate when the data meet certain assumptions (such as independent samples and approximately normal distributions of the sample proportions). The other tests listed (F test for the ratio of variances, pooled-variance t test, and F test for the difference between two proportions) are not appropriate for comparing proportions in this way.

If You Wish to Determine Whether There Is Evidence That