Find the mean deviation of the set of numbers 4... - JAMB Mathematics 1994 Question
Find the mean deviation of the set of numbers 4, 5, 9
A
zero
B
2
C
5
D
6
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Correct Option: B
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 & & 6\end{array})
M.D = (\frac{|x - x|}{N})
= (\frac{6}{3})
= 2
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