Question: 7.86 In a fatigue study, the time spent working by employees in a factory was observed. The ten readings (in hours) were 4.8 3.6 10.8

7.86 In a fatigue study, the time spent working by employees in a factory was observed. The ten readings (in hours) were 4.8 3.6 10.8 5.7 8.2 6.8 7.5 7.7 6.3 8.6 Assuming the population sampled is normal, construct a 90% confidence interval for the corresponding true mean.

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