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GCE Mathematics 1989 Question 29

Question 29

Measures of Central Tendency

For a class of 30 students, the scores in a Mathematics test out of 10 marks were as follows:
4, 5, 7, 2, 3, 6, 5, 5, 8, 9,
5, 4, 2, 3, 7, 9, 8, 7, 7, 7,
3, 4, 5, 5, 2, 3, 6, 7, 7, 2.
What is the median score?

  1. A.3
  2. B.4
  3. C.5
  4. D.6
  5. E.7
Show the answer and explanation

Answer: C (5)

Explanation

In order, the 15th and 16th of the 30 scores are both 5 (there are 11 or 12 scores below 5 and 6 fives), so the median is 5.