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A professor wants to estimate how many hours per week her students study. A simple random...

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Statistics

A professor wants to estimate how many hours per week herstudents study. A simple random sample of 78 students had a mean of15.0 hours of studying per week. Assume that the POPULATIONstandard deviation is known to be 2.3 hours per week.

a. Construct a​ 90% confidence interval for the mean number ofhours a student studies per week.

b. Interpret the confidence interval you found in part​ (a) inthe SHOW YOUR WORK area.

c. If Prof. St.​ John's on-line statistics course studentsstudy an average of 20 hours per​ week, are they considered​outliers? (Answer in the SHOW YOUR WORK​ area) Explain.

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