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

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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)

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dNon

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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)

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cP(X>x)

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dP(X≤x)

✓


View Answer P(X≤x)

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