Business, 16.01.2020 07:31 andybiersack154

41.
fewer young people are driving. in 1983, 87% of 19-year-olds had a driver's license.
twenty-five years later that percentage had dropped to 75% (university of michigan
transportation research institute website, april 7, 2012). suppose these results are based
on a random sample of 1200 19-year-olds in 1983 and again in 2008.
a. at 95% confidence, what is the margin of error and the interval estimate of the num-
ber of 19-year-old drivers in 1983?
b. at 95% confidence, what is the margin of error and the interval estimate of the num-
ber of 19-year-old drivers in 2008?
c. is the margin of error the same in parts (a) and (b)? why or why not?

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41.
fewer young people are driving. in 1983, 87% of 19-year-olds had a driver's license.
t...

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