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

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. Var (kY)= ____________?

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

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. Sample variance S2 is unbiased estimator of population variance 26 because ________________?

   A. E(S2) = s2 B. E(u) = X C. E(P) = P D. Ux = u...

9. suppose for 40 observation, the variance is 50. If all the observation are increased by 20, the variance of these increased observation will be_________?

   A. 50 B. 70 C. 50/20 D. 50-20=30...

10. The variance of 5 numbers is 10. If each number is divided by 2, then variance of new number is_____________?

    A. 20 B. 5 C. 2.5 D. 0...