An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and post-training customer survey. Seven customers were randomly selected and completed both surveys. The results follow.
|
Customer
|
Pre-training survey
|
Post-training survey
|
|
A
|
20
|
22
|
|
B
|
19
|
19
|
|
C
|
24
|
24
|
|
D
|
21
|
24
|
|
E
|
20
|
22
|
|
F
|
19
|
20
|
|
G
|
16
|
22
|
What is the value of the test statistic?