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In Test-1 of Math-120 you scored 85, where the mean score of the class is 70...

In Test-1 of Math-120 you scored 85, where the mean score of the class is 70 and standard deviation = 5. On Math-150 Test-1 you scored 88, where the mean score on that class is 76 and standard deviation = 6. You did comparatively better on which test, Math-120 or Math-150? Show and explain your reasoning with the help of z-score.

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