Statistics MCQs

Page No. 57

Suppose for 40 observations, the variance is 50. If all the observations are increased by 20, the variance of these increased observation will be______________?


a50


b70


c50/20


d50-20 = 30


View Answer 50

The variance of 5 numbers is 10. If each number is divided by 2, then the variance of new numbers is______________?


a20


b5


c2.5


d5.5


View Answer 2.5

The standard deviation is always _________ than mean deviation?


aGreater


bLess


cEqual


dNone


View Answer Greater

The measure of Dispersion can never be________________?


aPositive


bNegative


c0


d1


View Answer Negative

If mean is 25 and standard deviation is 5 then C.V (Coefficient of variation) is_______________?


a100%


b25%


c20%


dNone of these


View Answer 20%

The first moment about means is always_________________?


aZero


b1


cNegative


dNone of these


View Answer Zero

Lack of symmetry is called_______________?


aAbsolute Dispersion


bRelative Dispersion


cSkewness


dNon of these


View Answer Skewness

If right tail is longer than left tail then distribution is called _________________?


a Negatively Skewed


bPositively Skewed


cAll of above


dNone of these


View Answer Positively Skewed

______________is based on all observations of data?


aMedian


bMode


cMode


dNone of these


View Answer Mode

For Mesokurtic curve of the distribution, β2 is__________________?


aZero


b3


c3.1


dNone of these


View Answer 3

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