Question: the following without using the STAT TEST menu of your calculator: A random sample of 27 students' cars had a mean age of 12.9 years,

the following without using the STAT TEST menu of your calculator: A random sample of 27 students' cars had a mean age of 12.9 years, with a standard deviation of 3.8 years. Construct the 99% confidence interval for the mean age of all students' cars

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