Question

The mean deviation from the mean for the set of observations –1, 0, 4 is

• A. $\sqrt{\frac{14}{3}}$
• B. 2
• C. $\frac{2}{3}$
• D. None of these

Answer 1

Answer: (B)

2

Answer 2

Mean $= \frac{- 1 + 0 + 4}{3} = 1$.

Hence M.D. (about mean)

$= \frac{| - 1 - 1| + |0 - 1| + |4 - 1|}{3} = 2$.