17. An investigation of the effectiveness of a training program to improve customer relatio included a pre-training and a post-training customer survey. To compare the difference computed (post-training survey score – pre-training survey score). Seven customers we randomly selected and completed both surveys. The results are shown here. Customer Pre-training Survey Post-training Survey A 8 5 C 10 10 D 7 10 E 8. F 6 G 8

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17. 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
8
5
5
C
10
10
7
10
E
6
8
F
5
2
8.
For a 0.05 significance level, what is the decision regarding the hypothesis that the training was
effective in improving customer relationships?
A) Reject the null hypothesis and conclude that the training was effective.
B) Reject the null hypothesis and conclude that the training was ineffective.
C) Fail to reject the null hypothesis and conclude that the mean survey scores are the same.
D) Fail to reject the null hypothesis and conclude that the mean survey scores are not equal.
Transcribed Image Text:17. 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 8 5 5 C 10 10 7 10 E 6 8 F 5 2 8. For a 0.05 significance level, what is the decision regarding the hypothesis that the training was effective in improving customer relationships? A) Reject the null hypothesis and conclude that the training was effective. B) Reject the null hypothesis and conclude that the training was ineffective. C) Fail to reject the null hypothesis and conclude that the mean survey scores are the same. D) Fail to reject the null hypothesis and conclude that the mean survey scores are not equal.
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