Question: Combining test scores The first Stats exam had a mean of 65 and a standard deviation of 15 points; the second had a mean of

Combining test scores The first Stats exam had a mean of 65 and a standard deviation of 15 points; the second had a mean of 85 and a standard deviation of 10 points.

Derrick scored an 85 on both tests. Julie scored a 70 on the first test and a 100 on the second. They both totaled 170 points on the two exams, but Julie claims that her total is better. Explain

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