A professor believes that students take an average of 15 credit hours per semester. A random sample of 24 students who reported the following number of credit hours they were taking is in the attached excel. spreadsheet.

a) What does this sample tell us about the students at the university in general?

b) Find and interpret a 95% confidence interval for the mean number of credit hours students are taking. Be sure to check the necessary conditions. Show your work.

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