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. One student earned a 55 on the history test and a 70 on the physics test. Calculate the z-score for each test. On which test did the student perform better?

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The Answer of 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. One student earned a 55 on the history test and a 70 on the physics test. Calculate the z-score for each test. On which test did the student perform better?

Test Scores for a History Class Had a Mean of 79