Statistics MCQs

Page No. 58

In uni-model distribution, if mode is less than mean_______________?


aSymmetrical


bNormal


c Positively Skewed


dNegatively Skewed


View Answer Positively Skewed

The Coefficient of Skewness is always zero for ____________ distribution?


aSymmetrical


bSkewed


cAll of above


dNone of these


View Answer Symmetrical

Second moment about mean is_______________?


aStandard Deviation


bVariance


cCoefficient of Variation


dNone of these


View Answer Variance

_____________is used to compare the variation or dispersion in two or more sets of data even though they are measured in different units?


aRange


bStandard Deviation


cCoefficient of Variation


dMean Deviation



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_______________?


a0


b2.58


c5


d4.66


View Answer 2.58

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


aSD(X)−SD(Y)


bSD(X)+SD(Y


cSD(X)+SD(Y)−−−−−−−−−−−−−−√


dVar(X)+Var(Y)−−−−−−−−−−−−−−−√


View Answer SD(X)+SD(Y

Standard deviation is calculated from the Harmonic Mean (HM) ________________?


aAlways


bSometimes


cNever


dNone of these


View Answer Never

If a and b are two constants, then Var(a+bX) is_______________?


aa±bVar(X)


bVar(a)±Var(X)


c±bVar(X)


db2Var(X)


View Answer b2Var(X)

The sum of squared deviations of a set of n values from their mean is__________________?


aZero


bMaximum


cLeast


dNone


View Answer Least

The measure of dispersion is changed by a change of_____________?


aOrigin


bScale


cAlgebraic Signs


dNone


View Answer Scale

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