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JAMB Mathematics 2004 Question 45

Question 45

Measures of Dispersion

Find the mean deviation of 1, 2, 3 and 4.

  1. A.1.0
  2. B.1.5
  3. C.2.0
  4. D.2.5
Show the answer and explanation

Answer: A (1.0)

Explanation

The mean is 2.5; the absolute deviations are 1.5, 0.5, 0.5, 1.5, which total 4. Mean deviation = 4/4 = 1.0.