An Investigation of the Effectiveness of a Training Program to Improve

Multiple Choice

An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and a 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 are shown here. 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