If on-line statistics course students study an average of 20 hours per week, are they considered outliers


If on-line statistics course students study an average of 20 hours per week, are they considered outliers

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A professor wants to estimate how many hours per week her students study. A simple random sample of 78 students had a mean of 15.0 hours of studying per week. Assume that the POPULATION standard deviation is known to be 2.3 hours per week.

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

(___, ____​) Round to one decimal place.

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

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


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