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?

Write the contrapositive of the conditional statement. determine whether the contrapositive is true or false. if it is false, find a counterexample. a converse statement is formed by exchanging the hypothesis and conclusion of the conditional. a) a non-converse statement is not formed by exchanging the hypothesis and conclusion of the conditional. true b) a statement not formed by exchanging the hypothesis and conclusion of the conditional is a converse statement. false; an inverse statement is not formed by exchanging the hypothesis and conclusion of the conditional. c) a non-converse statement is formed by exchanging the hypothesis and conclusion of the conditional. false; an inverse statement is formed by negating both the hypothesis and conclusion of the conditional. d) a statement not formed by exchanging the hypothesis and conclusion of the conditional is not a converse statement. true