Refer to Exercise 11.7. Which pairs of mean GPAs differ significantly (4 majors)?
Exercise 11.7
Semester GPAs are compared for seven randomly chosen students in each class level at Oxnard University. Do the data show a significant difference in mean GPAs?

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GPA for Randomly Selected Students in Four Business Majors Marketing Finance Human Resources Accounting 2.48 2.19 2.62 3.15 3.56 2.53 3.31 3.16 3.01 3.07 2.88 3.33 2.87 2.85 2.93 2.89 3.48 3.33 3.53 2.95 3.58 3.54 3.71 2.94 3.46 3.50 3.25 3.20