Question

A recent study by Allstate Insurance Co. finds that 82% of teenagers have used cell phones while driving (The Wall Street Journal, May 5, 2010). Suppose this study was based on a random sample of 50 teen drivers.
a. Construct the 99% confidence interval for the proportion of all teenagers that have used cell phones while driving.
b. What is the margin of error with 99% confidence?



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  • CreatedJanuary 28, 2015
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