IAB conducted a study of U.S. online adults that included 416 tablet owners. The study found that 221 tablet owners use their tablet while watching TV. The authors of the report imply that the survey proves that more than half of all tablet owners use their tablet while watching TV at least once per day.

a. Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to try to prove that more than half of all tablet owners use their tablet while watching TV at least once per day.

b. Based on your result in (a), is the claim implied by the authors valid?

c. Suppose the study found that 242 tablet owners use their tablet while watching TV at least once per day. Repeat parts (a) and (b).

d. Compare the results of (b) and (c).