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WAEC Further Mathematics 2013 Question 36

Question 36

Statistics

Calculate the mean deviation of 1, 2, 3, 4, 5, 5, 6, 7, 8, 9.

  1. A.2
  2. B.3
  3. C.4
  4. D.5
Show the answer and explanation

Answer: A (2)

Explanation

Mean = 50/10 = 5. The absolute deviations 4, 3, 2, 1, 0, 0, 1, 2, 3, 4 add to 20, so MD = 20/10 = 2.