Cov(X, X) =
A0
BE(X²)
CVar(X)
DE(X)
Answer & Solution
Correct answer: C. Var(X)
Cov(X, X) = E[(X - μ)(X - μ)] = E[(X - μ)²] = Var(X). Covariance is generalization of variance to pairs.
Related questions
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