From past experience, a professor believes that the average score on a midterm exam is 75. A sample of 20 students' exam scores is as follows: 50 74 65 71 69 75 76 70 70 68 63 72 70 71 81 76 73 72 71 80 Can the professor conclude that the students' average differs from 75? Use a = 0.10. NOTE: Ex=1417 and Ex =101213

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