A study of the ages of motorcyclists killed in crashes involves the random selection of 168 drivers with a mean of 35

Statistics Jul 27, 2020

A study of the ages of motorcyclists killed in crashes involves the

random selection of 168 drivers with a mean of 35.37 years. Assuming that σ=11.8 ?years, construct and interpret a 90?% confidence interval estimate of the mean age of all motorcyclists killed in crashes.

What is the 90?% confidence interval for the population mean μ??

<μ<

?(Round to two decimal places as? needed.)