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QUESTION 9 9) The z-score of a student's grade is -1.2. If the mean exam grade is 80, which of the following coild be the

QUESTION 9 9) The z-score of a student's grade is -1.2. If the mean exam grade is 80, which of the following coild be the value of the student's grade? O a. cannot be determined O b. 71 O c. 80 O d. 90

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