Chapter 9.1, Problem 21E

Formulating Hypotheses. In Exercises 15–22, state the null and alternative hypotheses for a hypothesis test; indicate whether the hypothesis test will be left-tailed, right-tailed, or two-tailed; and clearly state the two possible conclusions that address the given claim.

21. Print Books. A bookstore owner claims that the proportion of people who read books in print is not 0.23.