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Raul received a score of 76 on a history test for which the class mean was...

Raul received a score of 76 on a history test for which the class mean was 70 with a standard deviation of 9. He received a score of 78 on a biology test for which the class mean was 70 with standard deviation 7. On which test did he do better relative to the rest of the class?

biology test

history test

or the same

Math   Statistics-And-Probability   
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Answer #1

He did better in Biology test.

Because in biology test z-score is positive and larger than history test.

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