Statistics MCQs

Page No. 55

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


a140

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b300

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c180

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d280

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View Answer 280

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


a140th item

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b130th item

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c160th item

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d150th item

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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

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bThe square root of the product of N values

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cThe fourth root of the product of N values

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dThe Nth root of the product of N values

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The sum of squared deviation is least from_________________?


aMedian

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bMean

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cMode

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dStandard Deviation

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View Answer Mean

The average of first n natural numbers is_______________?


an+12

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bn2

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cAll of the above

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dNone of these

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View Answer n+12

The mean of a constant “b” is_________________?


aZero

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bb

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call

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dNone

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View Answer b

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


aMean

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bMode

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cMedian

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dStandard Deviation

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View Answer Mean

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


a9

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b0.9

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c70

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d90

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View Answer 90

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


a21

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b24

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c28

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d0

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View Answer 24

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


aab2

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b2a2

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c(a+b)/2

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da−b2

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View Answer (a+b)/2

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