Fewer young people are driving. in 1983, of -year-olds had a driver's license. twenty-five years later that percentage had dropped to (university of michigan transportation research institute website, april 7, 2012). suppose these results are based on a random sample of -year-olds in 1983 and again in 2008. a. at confidence, what is the margin of error and the interval estimate of the number of -year-old drivers in 1983? round your intermediate answers to four decimal places. margin of error (four decimal places)