A study of the ages of motorcy

onolehgu
timer Asked: Oct 30th, 2015

Question Description

A study of the ages of motorcyclists killed in crashes involves the random selection of 154 drivers with a mean of 34.28 years. Assuming that population standard deviation is 9.1 years. Construct and interpret a 90% confidence interval estimate of the mean age of all motorcyclists killed in crashes.

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