Sleeping outlier:A simple random sample of eight college freshmen were asked how many hours of sleep they typically got per night. The results were

6

8.5

7.5

24

9

8.5

8

6.5

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Notice that one joker said that he sleeps

24

hours a day.

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(a) The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct a

95%

confidence interval for the mean amount of sleep from the remaining values. Round the answers to two decimal places.

A

95%

confidence interval for the mean amount of sleep from the remaining values is

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