GCSE Maths: Cumulative Frequency & Box Plots
Draw and interpret cumulative frequency curves and box plots. Practise it with adaptive questions for AQA, Edexcel, OCR and Eduqas.
What you need to know
The concepts examiners test on cumulative frequency & box plots, and what each one is really asking.
Where marks get lost
The exam technique that separates a correct method from a correct answer.
- Plotting at the midpoint instead of the UPPER BOUND for cumulative frequency
- Joining points with a ruler (it must be a smooth curve!)
- Reading the quartile values from the y-axis and leaving them as the answer, rather than reading down to the x-axis
Cumulative Frequency & Box Plots questions students ask
Is Cumulative Frequency & Box Plots on the Foundation paper?
Yes. Cumulative Frequency & Box Plots appears at both Foundation and Higher tier, though Higher papers take it further.
What should I know before starting Cumulative Frequency & Box Plots?
It builds on Averages and Plotting graphs. If those feel shaky, practise them first — Cumulative Frequency & Box Plots questions assume them.
What is the most common mistake in Cumulative Frequency & Box Plots?
Plotting at the midpoint instead of the UPPER BOUND for cumulative frequency.
Which exam boards cover Cumulative Frequency & Box Plots?
All four we support — AQA, Edexcel, OCR and Eduqas. GCSE Maths subject content is set by the DfE, so the topic is common to every board; what changes is the paper structure and the grade boundaries.