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Calculate standard deviation from the fo...

Calculate standard deviation from the following items .
8 , 9 , 12 , 15 , 17 , 20 , 24

Text Solution

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`barX = (105)/(7) = 15`
`sigma = sqrt((sum x^(2))/(N)) = sqrt((204)/(7))`
`= sqrt(29*14) = 5*40` approx .
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