Variance/Definition: Difference between revisions

Latest revision as of 17:21, 29 June 2009

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Variance [r]:

A statistical measure of the variability of a random quantity (defined as the mean squared deviation from the mean value).

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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)).
-==Formula==
+A statistical measure of the variability of a random quantity (defined as the mean squared deviation from the mean value).
-If X is a random variable with mean &mu;, the variance of X is denoted by Var(X)
-[[Image:Variance.png]]