Which of the following is NOT a property of Arithmetic mean (A.M)?
Answer & explanation
Correct answer: option 1
The correct answer is option 1: Σ (X - $\overline{X}$) = 0
Two interesting properties of A.M. are:
(i) the sum of deviations of items about arithmetic mean is always equal to zero. Symbolically, Σ ($\overline{X}$ – X ) = 0.
(ii) arithmetic mean is affected by extreme values. Any large value, on either end, can push it up or down.