x ∴x x-\(\overline{X}\) /x-\(\overline{X}\)/ x 1 -1 1 2x 2 0 0 x+1 2 0 0 3x 3 1 1 ∑/x-\(\overline{X}\)/ = 2 Mean(\(\overline{X}\)) = \(\frac{ x + 2x + x + 1 + 3x}{4}\) = 2 2 = \(\frac{7x + 1}{4}\) 8 = 7x + 1 7x = 8 - 1 = 7 x = \(\frac{7}{7}\) = 1 Mean deviation = \(\frac{∑(| x - \overline{X}|)}{n}\) M.D = \(\frac{2}{4}\) = \(\frac{1}{2}\) = 0.5