Question: During the past year on the average 289 books were
During the past year, on the average 289 books were checked out daily from the public library in Stucco, Wyoming. This year, the city fathers of Stucco have attempted to increase circulation through various promotions such as bookmobiles, youth programs, and visits to local organizations. In order to evaluate their efforts, they have taken a random sample of 50 days of the current year and calculated the mean number of books checked out daily—301 and the standard deviation—27. Based on these data, is it possible that the daily circulation of books has not increased? Should the city fathers continue the promotions?
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