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What is the mean deviation of 3, 5, 8, 11, 12 and 21?

What is the mean deviation of 3, 5, 8, 11, 12 and 21?
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  • A 4.7
  • B 60
  • C 3.7
  • D 10
Correct Answer: Option A
Explanation:

Mean \(= \bar{x} = \frac{60}{6} = 10\)
mean deviation \(= \frac{\sum|x-\bar{x}|}{n} = \frac{28}{6}\)
= 4.7

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