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 mule, the variance of X is denoted by Var(X) | |||
[[Image:Variance.png]] | |||
Revision as of 03:11, 6 August 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)).
Formula
If X is a random variable with mean mule, the variance of X is denoted by Var(X)
