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Question Description
Fewer young people are driving. In 1983, 87% of 19-year-olds had a drivers license. Twentyfive years later that percentage had dropped to 75%. Suppose the results are based on a randomsample of 1200 19-year-olds in 1983 and again in 2008, and we are interested in estimating thepopulation proportion of 19-year-old drivers in 2008.
a. At 95% confidence, what is the margin of error?
b. Develop a 95% confidence interval for the proportion of 19-year-old drivers in 2008.
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