Check My Work The Centers for Disease Control reported the percentage of people 18 years of age and older who smoke (CDC website, December 14, 2014). Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of.30. a. How arge a sample should be taken to estimate the proportion of smokers in the population with a margin of error of 2 to the nearest whole number use 95% confidence つ! b. Assume that the study uses your sample size recommendation in part (a) and finds 520 smokers. What is the point estimate of the prop o \ decimals)? c. What is the 95% confidence interval for the proportion of smokers in the popula tion (to 4 decimals)

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