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WAEC Mathematics 2016 Question 45

Question 45

Measures of Dispersion

Find the lower quartile of the distribution illustrated by the cumulative frequency curve.

Diagram for this question
  1. A.17.5
  2. B.19.0
  3. C.27.5
  4. D.28.0
Show the answer and explanation

Answer: B (19.0)

Explanation

Total frequency is 600, so the lower quartile is at cumulative frequency 150; reading across to the curve and down gives about 19.