The Centers for Disease Control reported the percentage of people 18 years of age and older who smoke (CDC website, Dece

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The Centers for Disease Control reported the percentage of people 18 years of age and older who smoke (CDC website, Dece

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The Centers For Disease Control Reported The Percentage Of People 18 Years Of Age And Older Who Smoke Cdc Website Dece 1
The Centers For Disease Control Reported The Percentage Of People 18 Years Of Age And Older Who Smoke Cdc Website Dece 1 (83.97 KiB) Viewed 41 times
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 large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of .02 (rounded up to the next whole number)? Use 95% confidence. b. Assume that the study uses your sample size recommendation in part (a) and finds 520 smokers. What is the point estimate of the proportion of smokers in the population (to 4 decimals)? c. What is the 95% confidence interval for the proportion of smokers in the population (to 4 decimals)? )
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