Question

The mean deviation from the data $3,10,10,4,7,10,5$ is

• A. $3$
• B. $2$
• C. $3.75$
• D. $2.57$

Answer 1

The correct option is D $2.57$

$\text{Mean,}\overline{x}=\frac{49}{7}=7$
$\text{Mean deviation}=\frac{|7-3|+|7-10|+|7-10|+|7-4|+|7-7|+|7-10|+|7-5|}{7}$
$=\frac{18}{7}=2.57$