The variance of a random variable X: (probability) weighted sum of its squared distance from each value to the mean. =Var[X] =E[(x - Mx)?]=EP(x=
The variance of a random variable X: (probability) weighted sum of its squared distance from each value to the mean. " =Var[X] =E[(x - Mx)?]=EP(x= a)(a-Hx)' a Var [X] is also denoted by Ox
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