4MA1/2H Jan 2022, Question 15: Finding the Median and Quartiles
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2H (Higher) · Calculator · 3 marks
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The question, in short
From eleven daily cycling distances in kilometres, work out the interquartile range of the data set.
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Solution · 3 marks
- 15 5 7 8 10 12 13 14 16 21 23
- 2Position of lower quartile = (11 + 1) / 4 = 3rd value → 7
- 3Position of upper quartile = 3 × (11 + 1) / 4 = 9th value → 16
- 4Interquartile range = 16 − 7 = 9
Answer9
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