Variance

1. eltérés
2. diszharmónia
3. Sablon:Mat variancia In probability theory and statistics, variance is the expected value of the 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 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 distribution, and the covariance of the random variable with itself, and it is often represented by ${\sigma }^2$, $s^2$, $\mathrm{Var}(X)$, $V(X)$, or $𝕍(X)$.