Statistics MCQs

Page No. 51

Var (kY)= ____________?


ak Var (Y)


bk2 Var(Y)


cVar(Y)


dk2


View Answer k2 Var(Y)

For two independent random variables X & Y, Var (x ± y)=___________?


aVar(X) + Var (Y)


bVar(X) – Var (Y)


cVar (X)±


dZero


View Answer Var(X) + Var (Y)

Coefficient of variation (C.V) is given below:_________________?


aMean/S.D.


bS.D./Mean x 100


cMean/S.D. x 100


dS.D./Mean


View Answer S.D./Mean x 100

If c is non-random variable, the E(C) is_______________?


aZero


bC


c1


d2


View Answer C

What is the probability that a ball drawn at random from a jar ?


a0.1


b1


c0.5


dCannot be determined from given information



For a probability density function (pdf), the probability of a single point is_____________?


a1


b2


c0


dConstant


View Answer 0

Probability of occurrence of an event lies between______________?


a-1 and 0


b0 and 1


c-1 and 1


dexactly 1


View Answer 0 and 1

For a random variable X, E(X) is_______________?


aHarmonic Mean


b Geometric Mean (GM)


cArithmetic Mean (AM)


dNon



For distribution Function F(X),F(-∞)=0 and F(∞)= ?


a0


b-1


c1


dNon of These


View Answer Non of These

The distribution function F(X) is represent by_______________?


a P(X=x)


bP(X)


cP(X>x)


dP(X≤x)


View Answer P(X≤x)

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