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The mean of 100 observations is 40 and their standard deviation is 3. The sum of squares of all deviations is ____ (1) 40000 (2) 160900 (3) 160000

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The mean of 100 observations is 40 and their standard deviation is 3. The sum of squares of all deviations is ____

(1) 40000

(2) 160900

(3) 160000

(4) 30000

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Answer is (2) 160900

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