Question

For a certain distribution, $M.D.$ about mean is $77$. If each item is reduced by $20$, what effect would this have on mean deviation?

Answer 1

Given

M.D about mean is $77$

M.D $\left(\overline{x}\right)=\frac{|x_i-\overline{x}|}{n}=77$

Here each item is reduced by $20$

Hence the effective mean deviation of the reduced term would be $77$, as each term is reduced by the same amount.