Jeanette took two tests. Find her z-score for each test. (Remember: The number of standard deviations between a score and the mean score is indicated by a z-score.) On which did she score better compared with others in her class? Test ATest BJeanette’s score9095Mean score6460Standard deviation810

Calculate each z-score using (score − mean) ÷ standard deviation. For Test A, (90 − 64) ÷ 8 = 3.25; for Test B, (95 − 60) ÷ 10 = 3.5. Since 3.5 is higher than 3.25, Jeanette scored better compared with her classmates on Test B. The correct choice is “Test A: 3.25; Test B: 3.5; Test B.”

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