A community college instructor wanted to check if the amount of time they estimated to complete online homework weekly was accurate for all of the students they taught. In a sample of 25 currently...

A community college instructor wanted to check if the amount of time they estimated to complete online homework weekly was accurate for all of the students they taught.

In a sample of 25 currently enrolled students, the
mean
amount of time the sample spent working on online homework weekly was 18.4 hours.  Assume the population of weekly time spent on online homework is normally distributed with a population standard deviation of 5.1 hours.

Create a 99% confidence interval estimate for the true population mean amount of time spent weekly working on online homework.

Fill in the following blanks by computing the
lower and upper boundaries for the confidence interval.
Round your final answer to one decimal place
(to the nearest tenth).
Only type in your numerical decimal answer,
you do not need to units/hours.

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