The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke.  Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke to be .30. a) How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of 2%? Use 95% confidence. b) Assume that the study uses your sample size recommendation above and finds 520 smokers. What is the point estimate of the proportion of smokers in the population? c) What is the 95% confidence interval for the proportion of smokers in the population?

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Q: A physical therapist wants to determine the difference in the proportion of men and women who…

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Q: intended population

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.