A study by the U.S. National Center for Health Statistics provided a point estimate of 25.5% for

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A study by the U.S. National Center for Health Statistics provided a point estimate of 25.5% for the percentage of adult Americans who were currently smokers. The sample size was 42,000. Assuming that this sample has the characteristics of a random sample, construct and interpret a 99% confidence interval for the population proportion of smok- ers. (Note: When n is very large, even confidence intervals with large confidence levels are narrow.).

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