Find the mean deviation of 6, 7, 8, 9, 10
-
A.
1.2 -
B.
1.5 -
C.
2 -
D.
8
Correct Answer: Option A
Explanation
(begin{matrix}
x & x-m & |x-m| \
6 & -2 & 2 \
7 & -1 & 1 \
8 & 0 & 0 \
9 & 1 & 1 \
10 & 2 & 2 \
& & 6
end{matrix}
)
Mean deviation(=frac{sum|x-m|}{n}=frac{6}{5} = 1.2)