A. a±bVar(X)
B. Var(a)±Var(X)
C. ±bVar(X)
D. b2Var(X)
E. (a±b)Var(X)
Related Mcqs:
- 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 - Var(2X+3) is________________?
A. 5 Var(X)
B. 4 Var(X)
C. 4 Var(X)+3
D. 5 Var(X)+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 - Var (kY)= ____________?
A. k Var (Y)
B. k2 Var(Y)
C. Var(Y)
D. k2 - 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 - if Var(θˆ)→0 as n → 0, then θˆ is said to be______________?
A. Sufficient
B. Efficient
C. Unbiased
D. Consistent - if Var(T2)_______________?
A. Efficient
B. Sufficient
C. Unbiased
D. Consistent - 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 - 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 - The variance of a constant is_______________?
A. Zero
B. Constant
C. a
D. None
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