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The algebric sum of diviation of a set o...

The algebric sum of diviation of a set of n values from their arithmetic means is a

A

n

B

0

C

1

D

None of these.

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If the algebric sum of the deviations of 20 observations measured from 30 is 2, then what would be the mean of these observations.

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Knowledge Check

  • If the sum of squares of the diviations of 10 observations taken from the mean 50 is 250, then the coefficient of variation is-

    A
    `10%`
    B
    `20%`
    C
    `25%`
    D
    `15%`
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