Business, 11.04.2020 20:50 nell1234565
A microwave manufacturing company has just switched to a new automated production system. Unfortunately, the new machinery has been frequently failing and requiring repairs and service. The company has been able to provide its customers with a completion time of 6 days or less. To analyze whether the completion time has increased, the production manager took a sample of 36 jobs and found that the sample mean completion time was 6.5 days with a sample standard deviation of 1.5 days. a) At a significance level of 0.10, test whether the completion time has increased. b) Find and interpret a 99% confidence interval for the mean completion time.
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A microwave manufacturing company has just switched to a new automated production system. Unfortunat...
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