An investigation of the effectiveness of a training program to improve customer
ID: 2927260 • Letter: A
Question
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.
Customer
Pre-training Survey
Post-training Survey
A
6
8
B
5
5
C
10
10
D
7
10
E
6
8
F
5
6
G
2
8
What is the value of the test statistic?
Multiple Choice
1.943
1.895
2.542
2.447
Customer
Pre-training Survey
Post-training Survey
A
6
8
B
5
5
C
10
10
D
7
10
E
6
8
F
5
6
G
2
8
Explanation / Answer
The statistical software output for this problem is:
Paired T hypothesis test:
D = 1 - 2 : Mean of the difference between Post-Training Survey and Pre-Training Survey
H0 : D = 0
HA : D 0
Hypothesis test results:
Hence,
Test statistic = 2.542
Option C is correct.
Difference Mean Std. Err. DF T-Stat P-value Post-Training Survey - Pre-Training Survey 2 0.78679579 6 2.5419556 0.044Related Questions
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