Raul received a score of 80 on a history test for which the class mean was 70 with standard deviation 10. He received a score of 75 on a biology test for which the class mean was 70 with standard deviation 2.5. On which test did he do better relative to the rest of the class?

Raul performed better in the biology test

Step-by-step explanation:

Given

History

Biology

Required

Where did he perform better relative to other students

To do this, we simply calculate the z score in both tests and make comparison.

z score is calculated as thus;

For history;

For biology;

Since the z score in the biology test is greater than that of the history test, then he performed better in the biology test

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