Suppose the scores on an exam have a mean of 70 with a standard deviation of 10. If one student has a test result with a z-score of -0.8 and a second student has a test Tosult with a z-score of 1.6, how many points higher was the second student's score than that of the first? О а. 12 O b. 10 O C. 20 O d. 2.4 О е. 24

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