Var (kY)= ____________?
Correct answer: B. k2 Var(Y)
- A. k Var (Y)
- B. k2 Var(Y)
- C. Var(Y)
- D. k2
Explanation
Multiplying a random variable by k multiplies its variance by the square of k: Var(kY) = k²Var(Y). Variance measures squared deviations, which is why k is squared.
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