Statistics MCQs

Page No. 56

The calculation of mean and variance is based on______________?


aSmall values only


bLarge values only


cExtreme values only


dAll values


View Answer All values

If β2=m4m22<3, the distribution is called______________?


aNormal


bMesokurtic


cLeptokurtic


dPlatykurtic


View Answer Platykurtic

The degree of peakedness is called__________________?


aDispersion


bSkewness


cSymmetry


dKurtosis


View Answer Kurtosis

Quartile Coefficient of skewness lies between______________?


a0 and 1


b-1 and +1


c-1 and 0


dNone of these


View Answer -1 and +1

If the third moment about mean is zero then distribution is_______________?


aMesokurtic


bPositively Skewed


cSymmetrical


dNegatively Skewed


View Answer Symmetrical

____________ is used to criterion of consistency i.e for consistence performance?


aRange


bStandard Deviation


c Coefficient of Variation


dMean Deviation



For a symmetrical distribution approximately 68% of the cases are included between _________________?


aX¯¯¯¯−S and X¯¯¯¯+S


bX¯¯¯¯−2S and X¯¯¯¯+2S


cX¯¯¯¯−3S and X¯¯¯¯+3S


dNone of these



If Y=−8X − 5 and SD of X is 3, then SD of Y is _______________?


a8


b3


c5


d24


View Answer 24

The variance of a constant is_______________?


aZero


bConstant


ca


dNone


View Answer Zero

Var(2X+3) is________________?


a5 Var(X)


b 4 Var(X)


c4 Var(X)+3


d5 Var(X)+3


View Answer 4 Var(X)

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