Statistics MCQs

Page No. 55

Find the median of the following datA. 160, 180, 200, 280, 300, 320, 400?


a140


b300


c180


d280


View Answer 280

In a frequency distribution the last cumulative frequency is 300, Median shall lie in____________?


a140th item


b130th item


c160th item


d150th item


View Answer 150th item

Given the N values in a series, the geometric mean is______________?


a The third root of the product of N values


bThe square root of the product of N values


cThe fourth root of the product of N values


dThe Nth root of the product of N values



The sum of squared deviation is least from_________________?


aMedian


bMean


cMode


dStandard Deviation


View Answer Mean

The average of first n natural numbers is_______________?


an+12


bn2


cAll of the above


dNone of these


View Answer n+12

The mean of a constant “b” is_________________?


aZero


bb


call


dNone


View Answer b

Sum of deviations will be zero if it is taken from_________________?


aMean


bMode


cMedian


dStandard Deviation


View Answer Mean

The mean of 10 numbers is 9, then sum of these numbers will be__________________?


a9


b0.9


c70


d90


View Answer 90

For a certain distribution if ∑(x−2)=18,∑(x−24)=0,∑(x−28)=−24) then arithmetic mean is_______________?


a21


b24


c28


d0


View Answer 24

Arithmetic mean of two positive numbers “X” and “Y” is_________________?


aab2


b2a2


c(a+b)/2


da−b2


View Answer (a+b)/2

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