IGCSE Maths / Working with data

Estimating the median from a cumulative frequency diagram

Edexcel International GCSE Maths (4MA1), chapter 19: Working with data, specification point 6.2a. Part of the full course.

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To estimate the median from a cumulative frequency diagram, read across from half the total frequency, then down to the value axis. The answer is an estimate because the original individual values have been grouped into classes.

More lessons in Working with data

• Bar charts, pie charts and pictograms
• Two-way tables and reading statistical diagrams
• Mean from a frequency table
• Estimated mean and modal class for grouped data
• Frequency density
• Drawing a histogram
• Reading frequencies from a histogram
• Completing a histogram from a part drawn graph
• Estimating a frequency within a class
• Building a cumulative frequency table
• Plotting a cumulative frequency diagram
• Reading values from a cumulative frequency graph
• Estimating how many are above or below a value
• Estimating the interquartile range from a cumulative frequency diagram
• Comparing two cumulative frequency distributions
• Mean, median, mode and range
• Quartiles and the interquartile range for discrete data
• What a measure of spread tells you
• Using the interquartile range to compare distributions