Question

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

• A. less than 3
• B. less than 1
• C. greater than 2.5
• D. greater than 4.9

Answer 1

The correct option is A less than 3

$\overline{x}=\frac{-1+0+4}{3}=1.\therefore \text{Mean Deviation}=\frac{1}{3}[|-1-1|+|0-1|+|4-1|]=2$