Math Moves

When each value of X occurs with the same probability, the variance takes on the more familiar form Var(X) = E[(X-µ)2] = = = . Two Important Properties of Variance: Var(aX) = a2Var(X) , a Var(X+b) =Var(X) , b When looking at linear combinations of random variables, an idea that arises in conjunction with the variance is that of covariance. ................
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