The Centers for Disease Control reported the percentage of people 18 years of age andolder who smoke (CDC website, December 14, 2014). Suppose that a study designed tocollect new data on smokers and nonsmokers uses a preliminary estimate of the proportionwho 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? Use 95% confidence.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Chapter4: Equations Of Linear Functions
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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? Use 95% confidence.

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