Edexcel IGCSE Math A 6.2.HD IQR from cumulative frequency
Practise cumulative-IQR questions by reading the lower and upper quartiles from the graph and subtracting the two estimates.
- Syllabus
- First assessment 2018
- Course
- Math A 4MA1
- Level
- Higher
Exam points
- Read lower and upper quartiles from a cumulative frequency graph accurately.
- Subtract the quartile estimates to find the interquartile range in context.
6.2.HD The interquartile range from a cumulative frequency question 1
A group of 60 students each sat an algebra test and a geometry test.
Each test was marked out of 110
The cumulative frequency graph gives information about the marks gained by the 60 students in the algebra test.
Cumulative frequency
Use the graph to find an estimate for the interquartile range of the marks gained in the algebra test.
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