Sleeping outlier: A simple random sample of ten college freshmen were asked how many hours of sleep they typically got per night. The results were
8.5 8
6.5 24
8.5 7.5
6 7 6.5 7.5
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Notice that one joker said that he sleeps 24 hours a day.
Part: 0/3
Part 1 of 3
(a) The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct a 90% confidence interval for the mean amount of sleep from
the remaining values. Round the answers to two decimal places.
A 90% confidence interval for the mean amount of sleep from the remaining values is 6.22 µ< 8.89
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