Mathematics, 26.11.2019 00:31, fortnite83

Apoll conducted in 1970 asked 1004 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 overbarequals18.9 books and sequals19.9 books. (a) construct a 99% confidence interval for the mean number of books read either all or part of during the preceding year. interpret the interval. (b) compare these results to a recent survey of 1004 people. the results of the survey indicated that x overbarequals12.6 books and sequals15.7 books. a 99% confidence interval for this survey is (11.32 comma 13.88 ). were people reading more in 1970 than they are today?

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Apoll conducted in 1970 asked 1004 people, "during the past year, about how many books, either hardc...