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The $S . D .$ of scores l, 2, 3, 4, 5, is

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Correct option is A

We know that the variance of first n naturalnumbers is n2−112Hence, required S.D. =52−112=2

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The S.D. of scores l, 2, 3, 4, 5, is

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The $S . D .$ of scores l, 2, 3, 4, 5, is