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(D) SMU vs. UTD Emily wants to know whether UTD students' grade distributions are similar to SMU students'. She randomly picks 120 UTD students

(D) SMU vs. UTD Emily wants to know whether UTD students' grade distributions are similar to SMU students'. She randomly picks 120 UTD students and 90 SMU students, and asks their average grades. The following contingency table summarizes the results: Grades Universities A D Total UTD 30 50 30 10 120 SMU 40 30 10 10 90 Total 70 80 40 20 210

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