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WAEC Mathematics 2019 Question 50

Question 50

Measures of Central Tendency

The following are scores obtained by some students in a test: 8, 18, 10, 14, 18, 11, 13, 14, 13, 17, 15, 8, 16, 13. How many students scored above the mean score?

  1. A.10
  2. B.9
  3. C.8
  4. D.7
Show the answer and explanation

Answer: D (7)

Explanation

The total is 188, so the mean is 188/14 ≈ 13.4. The scores above it are 14, 14, 15, 16, 17, 18, 18: 7 students.