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A Local Library Is Evaluating the Possibility of Expanding Its

Question 5

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A local library is evaluating the possibility of expanding its hours of operation.The library staff want to estimate the mean number of persons who patronize the library during the peak weekday hours from 3:30 P.M.to 5:00 P.M.They randomly sample 12 weekdays and find an average attendance of 220.15, with a standard deviation of 22.4.What is a 90% confidence interval for the true mean weekly patronage during the peak hours?


A) (208.627, 231.673)
B) (209.514, 230.787)
C) (179.920, 260.380)
D) (208.537, 231.763)

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