A study was conducted of the students admitted to top graduate business schools. The data contained in file named GPA show the undergraduate grade point average for the students and is consistent with findings reported ("Best Graduate Schools," U.S. News and World Report, 2001). Using past years' data, population standard deviation can be supposed known with > = .28. Determine the 95% confidence interval estimate of mean undergraduate grade point average for students admitted to top graduate business schools?
Q. Lower limit:
Q. Upper limit: