Variance forrásának megtekintése

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#[[eltérés]]
#[[diszharmónia]]  
#{{mat}} [[variancia]] In [[probability theory]] and [[statistics]], '''variance''' is the [[expected value]] of the [[Squared deviations from the mean|squared deviation from the mean]] of a [[random variable]]. The [[standard deviation]] (SD) is obtained as the square root of the variance. Variance is a measure of [[statistical dispersion|dispersion]], meaning it is a measure of how far a set of numbers is spread out from their average value. It is the second [[central moment]] of a [[Probability distribution|distribution]], and the [[covariance]] of the random variable with itself, and it is often represented by <math>\sigma^2</math>, <math>s^2</math>, <math>\operatorname{Var}(X)</math>, <math>V(X)</math>, or <math>\mathbb{V}(X)</math>.
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