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

Related Mcqs:

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

   A. Var(bX) + a
   B. b2 Var(X)
   C. b Var(x)
   D. None of these

2. Var(2X+3) is________________?

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

3. 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

4. Var (kY)= ____________?

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

5. 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

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. If the standard deviation of the values 2, 4, 6, 8 is 2.58, then the standard deviation of the values 4, 6, 8, 10 is_______________?

   A. 0
   B. 2.58
   C. 5
   D. 4.66
   E. 2.33

9. If mean is 25 and standard deviation is 5 then C.V (Coefficient of variation) is_______________?

   A. 100%
   B. 25%
   C. 20%
   D. None of these

10. The variance of a constant is_______________?

    A. Zero
    B. Constant
    C. a
    D. None