alleryStart learning →The variance of a random variable X is defined as
AE[X] − E[X²]
BE[X²] − E[X]
CE[(X − E[X])²]
DE[X²] + E[X]²
Answer & Solution
Correct answer: C. E[(X − E[X])²]
Var[X] = E[(X − E[X])²]
the convenient algebraic form is Var[X] = E[X²] − E[X]². Both are equivalent.
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