Variance of Random Variable | Probability theory
For discrete RV X, the variance is written as Var( X) = E[(X-m)2] where m = Expected value of X
Another formula for Var(X) = E[X2] –m2
For discrete RV X, the variance is written as Var( X) = E[(X-m)2] where m = Expected value of X
Another formula for Var(X) = E[X2] –m2