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Sets P {0,0,14,14}, Q {0,6,8,14}, R {6,6,8,8} all have mean 7. Smallest SD?
ASet Q
BAll equal
CSet P
DSet R
Answer & Solution
Correct answer: D. Set R
R has every value within 1 of the mean, so its SD is 1, against 5 for Q and 7 for P.
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