Question on: JAMB Mathematics - 2007
What is the mean deviation 0f 3, 5, 8, 11, 12 and 21?
A
37
B
60
C
10
D
4.7
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Correct Option: D
mean((\bar{x})) = (\frac{\sum x}{n})
= (\frac{7 + 5 + 2 + 1 + 2 + 11}{6}) = 10
M.D = (\frac{7 + 5 + 2 + 1 + 2 + 11}{6})
= (\frac{28}{6})
= 4.7
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