An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and 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 as follows:

Do the results of the survey show that the training program has improved customer service? Test at the 0.10 level of significance.

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Post-training Survey Pre-training Survey Customer A 6 B 5 10 10 D 10 E 6 5 6 G