Variance/Definition: Difference between revisions

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A statistical measure of the variability of a quantity (defined as the mean of the squares of the deviation of its values from their mean, and expressed mathematically as Var(x)).
A statistical measure of the variability of a quantity (defined as the mean of the squares of the deviation of its values from their mean, and expressed mathematically as Var(x)).
==Formula==
If X is a random variable with mean &mu;, the variance of X is denoted by Var(X)
[[Image:Variance.png]]

Revision as of 11:12, 21 September 2008

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Variance [r]: A statistical measure of the variability of a quantity (defined as the mean of the squares of the deviation of its values from their mean, and expressed mathematically as Var(x)).