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Help 5. Test scores for a history class had a mean of 79 with a standard deviation of 4.5. Test scores for a physics class

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5. Test scores for a history class had a mean of 79 with a standard deviation of 4.5. Test scores for a physics class had a mean of 69 with a standard deviation of 3.7. Suppose a student gets a 91 on the history test and a 90 on the physics test. Calculate the z-score for each test. On which test did the student perform better

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