Question

A poll conducted in 1979 asked 1008 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 bar=19.1 books and s=20.1 books.

a. Construct a 95% confidence interval for the mean number of books either read either all or part of during the preceding year. Interpret the interval.

b. Compare these results to a recent survey of 1008 people. The results of the survey indicated that x bar=12.7 books and s=16.2 books. A 95% confidence interval for this survey is (11.7, 13.7). Were people reading more in 1979 than they are today?

Answer 1