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