If a & b are constants, then Var (a + bX) equal to_________________?

Related Mcqs:

1. 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) E. (a±b)Var(X)...

2. For two independent random variables X & Y, Var (x ± y)=___________?

   A. Var(X) + Var (Y) B. Var(X) – Var (Y) C. Var (X)± D. Zero...

3. Var (kY)= ____________?

   A. k Var (Y) B. k2 Var(Y) C. Var(Y) D. k2...

4. The variance of randomvariable of x then var(x) = E[x-E[x]2 = E[________]?

   A. (X – A)2 B. E(x) C. (x – u)2 D. (x – 4)2...

5. Var(2X+3) is________________?

   A. 5 Var(X) B. 4 Var(X) C. 4 Var(X)+3 D. 5 Var(X)+3...

6. if Var(θˆ)→0 as n → 0, then θˆ is said to be______________?

   A. Sufficient B. Efficient C. Unbiased D. Consistent...

7. if Var(T2)_______________?

   A. Efficient B. Sufficient C. Unbiased D. Consistent...

8. The median of normal distribution corresponds to the value of Z equal to_________________?

   A. 0.5 B. 1 C. µ D. 0...

9. A scaling factor is used to_________________?

   A. Change a simple index to a weight index B. Convert the Paasche index to a Laspeyres index C. Change the base year D. change an aggregate index to a weighted index...

10. For discrete random ‘X’, the expectation of X i.e., E(x) is equal to:________________?

    A. ∑P(x) B. ∑x.P(x) C. ∑x2P(x) D. One...