Find the mean deviation of the set of numbers 4, 5, 9
-
A.
zero -
B.
2 -
C.
5 -
D.
6
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 & & 6end{array})
M.D = (frac{|x – x|}{N})
= (frac{6}{3})
= 2