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   | The number of standard deviations | 2014-06-15 |  
  |  | Dawn pose la question : 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.
 Penny Nom lui répond.
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