If X is the mean of  x1,x2,x3…xn Then, the algebraic sum of the deviations about mean X¯ is 

If X is the mean of  x1,x2,x3xn Then, the algebraic sum of the deviations about mean X¯ is 

  1. A

    0

  2. B

    X¯n

  3. C

    nX¯

  4. D

    none of these

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    Solution:

    The algebraic sum of deviations about mean is

    i=1nxiX¯=i=1nxii=1nX¯=nX¯nX¯=0

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