In Exercise 13.115, you performed a test of the mean matched pairs difference. Test with a 10%

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In Exercise 13.115, you performed a test of the mean matched pairs difference. Test with a 10% significance level to determine whether the normality requirement is violated. Use a 5% significance level, unless specified otherwise.

In exercise 13.115

An operations manager who supervises an assembly line has been experiencing problems with the sequencing of jobs. The problem is that bottlenecks are occurring because of the inconsistency of sequential operations. He decides to conduct an experiment wherein two different methods are used to complete the same task. He measures the times (in seconds). The data are listed here. Can he infer that the second method is more consistent than the first method?

Method 1 8.8 9.6 8.4 9.0 8.3 9.2 9.0 8.7 8.5 9.4 Method 2 9.2 9.4 8.9 9.6 9.7 8.4 8.8 8.9 9.0 9.7

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