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 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. For a 0.05 significance level, what is the critical value?

A) 1.943
B) 1.895
C) 1.645
D) 2.447