Var(2X+3) is________________?

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. 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...

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 X and Y are independent then SD (X − Y) is________________?

   A. SD(X)−SD(Y) B. SD(X)+SD(Y) C. SD(X)+SD(Y)−−−−−−−−−−−−−−√ D. Var(X)+Var(Y)−−−−−−−−−−−−−−−√ 18) If Y=−8X − 5 and SD of X is 3, then SD of Y is...

9. Geometric means of X1 and X2 is________________?

   A. X1+X2 B. X1+X2x C. X1+X2−−−−−−−√ D. X1×X2−−−−−−−√ E. X1−−−√+X2−−−√...

10. The Harmonic Mean of any two numbers is________________?

    A. a+b2 B. 2aba+b C. ab−−√ D. a+b...