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 For a 0.05 significance level, what is the decision regarding the hypothesis that the training was effective in improving customer relationships? Multiple Choice Reject the null hypothesis and conclude that the training was effective. Reject the null hypothesis and conclude that the training was ineffective. Fail to reject the null hypothesis and conclude that the mean survey scores are the same. Fail to reject the null hypothesis and conclude that the mean survey scores are not equal.
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 |
For a 0.05 significance level, what is the decision regarding the hypothesis that the training was effective in improving customer relationships?
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Reject the null hypothesis and conclude that the training was effective.
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Reject the null hypothesis and conclude that the training was ineffective.
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Fail to reject the null hypothesis and conclude that the mean survey scores are the same.
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Fail to reject the null hypothesis and conclude that the mean survey scores are not equal.
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