My data says 95% and the one from this sight says 99%

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 7.5 9.0 6.5 2.4 8. 5 6.5 7.0 7.5. Notice that one joker said that he sleeps 24 hours a day, a, The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct a 93% confidence interval for the mean amount of sleep from the remain ing valves . ba Leave the outlier in and construct the 95% confidence interval, Are the results noticeably diffrent ? Explain why it is important to check data for outliers