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

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