4MA1/2H Jan 2021, Question 12: Finding the Median and Quartiles
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2H (Higher) · Calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
From the listed waiting times in minutes for 15 people, find the interquartile range of the data.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1Order the data: 2, 3, 3, 4, 5, 6, 6, 8, 9, 10, 11, 13, 14, 15, 18
- 2Find median: 8 (8th value)
- 3Lower quartile (Q1): median of first 7 values = 4
- 4Upper quartile (Q3): median of last 7 values = 13
- 5Interquartile range = Q3 − Q1 = 13 − 4
- 613 − 4 = 9
Answer9
Stuck on a step? Read the free lesson: Finding the Median and Quartiles
Practise more finding the median and quartiles questions
Real 4MA1 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on finding the median and quartiles
Also searched as: 4MA1 2H January 2021 · 4MA1/2H · 4ma1 jan21 2h · question 12.
Lemmara is an independent study tool, not affiliated with or endorsed by Pearson Edexcel. The worked solutions are Lemmara’s own.