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Confidence interval for survey

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Reference no: EM132077371

A poll conducted in 1972 asked 1005 ?people, "During the past? year, about how many? books, either hardcover or? paperback, did you read either all or part of the way? through?" Results of the survey indicated that x = 19.2 books and s =20.2 books. Construct a 95?% confidence interval for the mean number of books read either all or part of during the preceding year. Interpret the interval. Also, Compare these results to a recent survey of 1005 people. The results of the survey indicated that x = 12.6 books and s =1 5.9 books. A 95?% confidence interval for this survey is (11.62, 13.58 ). Were people reading more in 1972 than they are? today?

Reference no: EM132077371

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