Q. The mean deviation from the mean of the set of observations, -1, 0, 4 is
A) 3
B) 1
C) -2
D) 2
Explanation
(d)
$\overline{x} = \frac{- 1 + 0 + 4}{3} = 1$
$\therefore MD = \frac{\Sigma|x_{i} - \overline{x}}{n}$
$= \frac{| - 1 - 1| + |0 - 1| + |4 - 1|}{3}$
$= 2$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.