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JAMB Mathematics 1983 Question 17

Question 17

Measures of Central Tendency

The scores of a set of final year students in the first semester examination in a paper are 41, 29, 55, 21, 47, 70, 70, 40, 43, 56, 73, 23, 50, 50. Find the median of the scores.

  1. A.47
  2. B.48½
  3. C.50
  4. D.48
  5. E.49.
Show the answer and explanation

Answer: B (48½)

Explanation

In order: 21, 23, 29, 40, 41, 43, 47, 50, 50, 55, 56, 70, 70, 73. With 14 scores the median is the average of the 7th and 8th: (47 + 50)/2 = 48½.