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 difference between two 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 in sample proportions to a standard normal distribution and calculates a p-value, which indicates the strength of evidence against the null hypothesis of no difference in proportions. The other tests listed are not appropriate for comparing proportions.

If You Wish to Determine Whether There Is Evidence That