Question: For 20-2 math 7. The marks on a math test had a mean of 74 and a standard deviation of 4. The marks on the

For 20-2 math

7. The marks on a math test had a mean of 74 and a standard deviation of 4. The marks on the second math test had a mean of 72 and a standard deviation of 9 (a) Which set of marks is more widely dispersed? /1 (b) Alan had a mark of 80 on both tests. Determine the number of standard deviations that Alan's mark is from the mean on each test. Which result appears to be the better mark

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