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What is the variance of the following numbers?: {3,5,2,2,4,7,8,5,7,12,6,4,}

1 Answer

Chandra S. · Stefan V. · De Rono

Oct 27, 2015

$7.4097$ $7.4097$

Explanation:

$¯ x = \frac{65}{12} = 5.4167$ $barx= 65/12 = 5.4167$

$V (X) = \frac{\sum x^{2}}{n} - {¯ x}^{2}$ $V (X) =(sum x^2) / n - barx^2$

$= \frac{441}{12} - {(\frac{65}{12})}^{2} = \frac{1067}{144} = 7.4097$ $= 441/12 - (65/12)^2 = 1067/144 = 7.4097$

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