In: Statistics and Probability
A professor wants to estimate how many hours per week her
students study. A simple random...
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.
b. Interpret the confidence interval you found in part (a) in
the SHOW YOUR WORK area.
c. If Prof. St. John's 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.