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If for a distribution ∑(x -5)= 3, ∑(x -5)^2 = 43 and the total number of item is 18,

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If for a distribution ∑(x -5)= 3, ∑(x -5)2 = 43 and the total number of item is 18, find the mean and standard deviation.

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Given, n = 18, ∑(x -5)= 3, ∑(x -5)2 = 43

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