Chapter 10, Problem T10.9SPT

To determine

To find out what is the most appropriate method of answering the question of interest.

Answer to Problem T10.9SPT

Option (e) is the correct option.

Explanation of Solution

We know that in general:

For one proportion, there is one-sample z test. But for two proportions there is two-sample z test. In the same way, for one mean there is one sample t test and for two means there is two sample t test or interval or paired t test or interval.

Use a test if you want to test the difference, equality, increase or decrease. Use an interval if you want to estimate an interval in which the true value lies.

In this question we want a two sample z test for a difference in proportions because we are interested in the estimate of the difference of the two proportions. Thus, option (e) is correct option.