Correct Answer: Option B

Explanation

x = \(\frac{\sum x}{N}\)

= \(\frac{18}{3}\)

= 6

\(\begin{array}{c|c} x & x - x & x - x \\ \hline 4 & -2 & 2\\ 5 & 1 & 1\\ 9 & 3 & 3\\ \hline & & 6\end{array}\)

M.D = \(\frac{|x - x|}{N}\)

= \(\frac{6}{3}\)

= 2

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