An investigation of the effectiveness of a training program

An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and post-training customer survey. To compare the differences they computed (post-training survey score - pre-training survey score). Seven customers were randomly selected and completed both surveys. The results follow.

This analysis is an example of ______________

A. A one-sample test of means

B. A two-sample test of means

C. A paired t-test

D. A test of proportions

An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and post-training customer survey. To compare the differences they computed (post-training survey score - pre-training survey score). Seven customers were randomly selected and completed both surveys. The results follow. This analysis is an example of ______________ A. A one-sample test of means B. A two-sample test of means C. A paired t-test D. A test of proportions

Solution

Because the customers completed both surveys, this is an example of a paired sample. Choice C.