PSYC 21621 Chapter Notes - Chapter 5/6: Standard Deviation
12 Mar 2019
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Which of the following z-scores corresponds to the lowest raw score: -1. Joe took an exam in his class, and got an 80. The average for his class was 70, with a standard deviation of 5. Jane took an exam in a different class, and got a 90. The average for her class was 70, with a standard deviation of 10. If we convert their grades to z-scores so that we can compare their performances, who did better, Joe or jane: based on their z-scores, they tied. Imagine this: you took an important exam for a class, and your instructor reported the results in z-scores. You were told you got a zero on the exam. What does this mean: your score was the class average. What z-score corresponds to a score that is below the mean by a standard deviation: -0. 5. The sample has a mean of 7 and a standard deviation of 2.
