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Mathematics, 28.06.2019 22:40 leannamat2106

Asurvey reports 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 that smoke of 0.2.how large a sample should be taken to know with 95% confidence the proportion of smokers within ± 0.02 of the true population proportion?

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