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Cumulative 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.
Our tutors see these errors again and again. Knowing them in advance gives you a head start.
Plotting cumulative frequency at the midpoint instead of the upper class boundary
Joining points with straight lines instead of a smooth curve
Reading the median from the wrong axis on the graph
This topic is tested by the following exam boards. Our tutors are specialists in each one.
Box plots (box-and-whisker diagrams) display the five-number summary of a dataset and are ideal for comparing distributions. Students draw, interpret and compare box plots, calculating the interquartile range and identifying skewness.
StatisticsFrequency 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.
StatisticsHistograms 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.
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.
Exam PreparationA detailed comparison of the three major GCSE Maths exam boards in the UK. Understand the differences in paper structure, question style, and grade boundaries to make the most of whichever board your school uses.
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Take our free diagnostic quiz to find out exactly where you stand, then get matched with a tutor who specialises in statistics.