Answering Exams

If a and b are two constants, then Var(a+bX) is_______________?

If a and b are two constants, then Var(a+bX) is_______________?

A. a±bVar(X)
B. Var(a)±Var(X)
C. ±bVar(X)
D. b2Var(X) (Correct)
E. (a±b)Var(X)

 

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