Find the mean deviation of these numbers 10, 12, 14, 15, 17, 19.
-
A.
2.5 -
B.
2.6 -
C.
2.7 -
D.
2.8
Correct Answer: Option A
Explanation
(begin{array}{c|c} x & d = x – bar{x} & |d| \ hline 10 & -4.5 & 4.5 \ 12 & -2.5 & 2.5\ 14 & -0.5 & 0.5\ 15 & 0.5 & 0.5\ 17 & 2.5 & 2.5\ 19 & 4.5 & 4.5\ hline sum x = 87 & & sum|d| = 15end{array})
(bar{x} = frac{sum x}{n})
= (frac{87}{6})
= 14.5