The mean deviation from the arithmetic mean of the discrete data $2,7,5,6,4,3,11,17,8$ is

• A

  $\frac{17}{2}$
• Correct answer
  B

  $\frac{10}{3}$
• C

  $\frac{37}{2}$
• D

  $9$

Solution

Given observations are $2,7,5,6,4,3,11,17,8$. $\therefore \quad \bar{x}=\frac{2+7+5+6+4+3+11+17+8}{9}=\frac{63}{9}=7$
Now, $M D=\frac{\Sigma d_i}{N}=\frac{30}{9}=\frac{10}{3}$

Hence, the correct answer is option: 'B'.