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Histograms display continuous grouped data using bars whose area (not height) represents frequency. This higher-tier topic requires students to calculate frequency density and interpret histograms with unequal class widths.
Our tutors see these errors again and again. Knowing them in advance gives you a head start.
Plotting frequency instead of frequency density on the y-axis
Confusing histograms with bar charts (histograms have no gaps between bars)
Calculating class width incorrectly for grouped data
This topic is tested by the following exam boards. Our tutors are specialists in each one.
Frequency tables organise raw data into categories or class intervals for analysis. Students must construct tables, calculate totals, and use them to find averages and draw statistical diagrams.
StatisticsCumulative frequency diagrams show running totals and are used to estimate the median, quartiles and interquartile range. Students draw the characteristic S-shaped curve and read off values at key percentile positions.
StatisticsAverages are fundamental to data analysis. Students must calculate mean, median, mode and range from raw data, frequency tables and grouped data, and understand which average is most appropriate in different contexts.
Everything you need to know about revising for GCSE Maths in 2026. From building a revision schedule to mastering every topic area, this comprehensive guide covers exam structure, study strategies, and expert tips to maximise your grade.
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Exam PreparationA clear guide to the differences between GCSE Maths Foundation and Higher tiers. Understand grade ranges, content differences, and how to make the right choice for your child's target grade and confidence level.
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