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WAEC Mathematics 1993 Question 37

Question 37

Measures of Central Tendency

Find the median of the following set of numbers: 28, 29, 39, 38, 33, 37, 26, 20, 15, 25

  1. A.33
  2. B.29.5
  3. C.29
  4. D.28.5
  5. E.28
Show the answer and explanation

Answer: D (28.5)

Explanation

In order: 15, 20, 25, 26, 28, 29, 33, 37, 38, 39. With 10 numbers, the median is the mean of the 5th and 6th: (28 + 29)/2 = 28.5.