Question

Mean deviation of $6,8,12,15,10,9$ through mean is:

• A. $10$
• B. $2.33$
• C. $2$
• D. None of these

Answer 1

Answer: (B)

$2.33$

$\overline{x}=\frac{6+8+12+15+10+9}{6}=\frac{60}{6}$

$\overline{x}=10$

Mean deviation about mean $=\frac{1}{6}[|6-10|+|8-10|+|12-10|+|15-10|+|10-10|+|9-10|]$

$=\frac{1}{6}\left(14\right)$

$=2.33$