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QUESTION 3 1 The variance of a group of scores is 9. What is the standard deviation? ● A. 81 ● B.1 C. 4.5 O D. 3
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Answer #1

Standard deviation is the square root of the variance.

The variance is 9

So the standard deviation is square root of 9,

Which is equal to 3

Hence answer is

D. 3

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