Var (kY)= ____________?

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. 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. 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

4. 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)

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. A random variable is ____________ ?

   A. Not a function
   B. A continuous variable
   C. A function
   D. None of these

9. The number of defective bulbs in a lot is example of ____________?

   A. Continuous variable
   B. Discrete variable
   C. Function
   D. None of these

10. Random numbers are used for selection of ____________?

    A. Random space
    B. Space
    C. Random sample
    D. Non of these