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August 3, 2015

Homework Help: Statistics

Posted by Polly on Wednesday, July 7, 2010 at 4:10pm.

A test of 60 youths and 140 adults showed that 22 of the youths and 10 of the adults were careless drivers. Use a 1% level of significance to test the claim that the youth percentage of careless drivers is higher than the adult percentage. Next find the 99% confidence interval for this problem.

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