Which is relatively better a score of 81 on a psychology test or a score of 46 o

Question

Which is relatively better a score of 81 on a psychology test or a score of 46 on an economics test? Scores on the psychology test have a mean of 90 and a standard deviation of 11. Scores on the economics test have a mean of 53 and a standard deviation of 3. Choose the correct answer below. A. The psychology test score is relatively better because its z score is less than the z score for the economics test score. B. The psychology test score is relatively better because its z score is greater than the z score for the economics test score. C. The economics test score is relatively better because its z score is greater than the z score for the psychology test score. D. The economics test score is relatively better because its z score is less than the z score for the psychology test score.

Explanation / Answer

z score on psychology

z=x-mean/stddev

=81-90/11

=-9//11

=-0.82

z score for economics

z=46-53/3

=-2.33

-0.82>-2.33

z score for psychology is gretarer than z score for economics

ANSWER B

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