Question on: WAEC Mathematics - 2004
Find the mean deviation of 6, 7, 8, 9, 10
A
1.2
B
1.5
C
2
D
8
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Correct Option: A
(\begin{matrix}
x & x-m & |x-m| <br />
6 & -2 & 2 <br />
7 & -1 & 1 <br />
8 & 0 & 0 <br />
9 & 1 & 1 <br />
10 & 2 & 2 <br />
& & 6
\end{matrix}
)
Mean deviation(=\frac{\sum|x-m|}{n}=\frac{6}{5} = 1.2)
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