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Cumulative frequency diagrams

The cumulative frequency is obtained by adding up the frequencies as you go along to give a
'running total'.
Drawing a cumulative frequency diagram
The table shows the lengths (in cm) of 32 cucumbers.
Before drawing the cumulative frequency diagram, we need to work out the cumulative…

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When looking at a cumulative frequency curve you will need to know how to find its median,
lower and upper quartiles and the interquartile range.
By drawing horizontal lines to represent 1/4 of the total frequency, 1/2 of the total frequency
and 3/4 of the total frequency, we can read…

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