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WAEC Further Mathematics 2009 Question 25

Question 25

Statistics

Which of the semi-interquartile range of a distribution?

  1. A.Mode − Median
  2. B.Highest score − Lowest score
  3. C.½(Upper Quartile − Median)
  4. D.½(Upper Quartile − Lower Quartile)
Show the answer and explanation

Answer: D (½(Upper Quartile − Lower Quartile))

Explanation

The semi-interquartile range is half the interquartile range: ½(Q3 − Q1).