Math CentralQuandaries & Queries


Question from Dawn, a student:

Suppose that, at a certain college, the average weight of all male students is 160 pounds with a standard deviation of 30 pounds. A certain male student weighs 145 pounds. Determine how many SD's his weight is above or below average.

Hi Dawn,

The average weight is 160 pounds and the standard deviation is 30 pounds. One person weighs 145 pounds. Is this above or below the average? How many pounds is it above or below the average? How many standard deviations is this?


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