Question: (d) What effect does blocking by gender have on the standard deviation of recumbent length for each gender? A. The standard deviation is lower for

(d) What effect does blocking by gender have on the standard deviation of recumbent length for each gender? A. The standard deviation is lower for each group than it is for the groups combined. B. The standard deviation for each group is the same as it is for the groups combined. C. The standard deviation is higher for each group than it is for the groups combined

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