Proof that the variance of a constant is zero: Var(a) = 0

Proof that variance of a constant times X is the constant squared times var of X: Var(aX)=a^2 Var(X)

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Почему "вероятность 0" не означает "невозможно"

Derivation.3.Variance as an Expectation

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Proof for the variance of a sum of random variables: Var(X+Y)=Var(X)+Var(Y)+2Cov(X,Y)

Why the constant is squared when finding the Variance of aX. Proof that Var(aX)=a^2Var(X)

Proof that expected value of sum of random variables is the sum of expected values: E(X+Y)=E(X)+E(Y)

Биномиальные распределения | Вероятности вероятностей, часть 1

Proof for the variance of a difference of random variables: Var(X-Y) = Var(X)+Var(Y)-2Cov(X,Y)

Variance (4 of 4: Proof of two formulas)

Proof that the Sample Variance is an Unbiased Estimator of the Population Variance

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Variance - Clearly Explained (How To Calculate Variance)

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Variance of a Random Variable as Expected Values

Proof that expected value of a constant is the constant: E(a) = a

Examples finding expected value of a constant: E(a) = a, and expected value of X: E(X)