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JAMB 2002 · UME · Q30

Calculate the mean deviation of the numbers 7, 3, 14, 9, 7 and 8.

Worked solution (try it first)
  1. The numbers add up to 48 and there are 6 of them, so the mean is 8.
  2. The distances from 8 are 1, 5, 6, 1, 1 and 0, which add up to 14.
  3. The mean deviation is 146=213\frac{14}{6} = 2\frac13, option B.

Also set as JAMB 2017 · UTME · Q4

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