12. Superdads. The Spike network commissioned a

Chapter 21, Problem 12

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12. Superdads. The Spike network commissioned a telephonepoll of randomly sampled U.S. men. Of the 712respondents who had children, 22% said yes to thequestion Are you a stay-at-home dad? (Time, August23, 2004)a) To help market commercial time, Spike wants an accurateestimate of the true percentage of stay-at-homedads. Construct a 95% confidence interval.b) An advertiser of baby-carrying slings for dads willbuy commercial time if at least 25% of men are stayat-home dads. Use your confidence interval to test anappropriate hypothesis, and make a recommendationto the advertiser.c) Could Spike claim to the advertiser that it is possiblethat 25% of men with young children are stay-at-homedads? What is wrong with the reasoning?

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