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(See Solution) Data in 1980 showed that about 40% of the adult population had never smoked cigarettes. In 2002, a national health survey interviewed a random sample

Question: Data in 1980 showed that about 40% of the adult population had never smoked cigarettes. In 2002, a national health survey interviewed a random sample of 2000 adults and found that 50% had never been smokers. Create a 95% confidence interval for the proportion of adults (in 2002) who had never been smokers.

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