Change data values and see the effect on the cumulative frequency diagram. Allows you to work out the median as well!
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Really useful resource for genearating lots of examples of cummulative frequency graphs.
A good attempt - although it would be better if the plot showed the endpoint of the interval versus cumulative frequency was shown - giving the classic 'S' shaped cummulative frequency diagram.
An excellent Excel spreadsheet which allows you to demonstrate and investigate the effect of changing data values on a cumulative frequency diagram. It is also provides a very useful tool to work out the median as well.
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