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Example The frequency table shows the examination marks of 80 students. . Cumulative frequency. Draw a cumulative frequency table and cumulative frequency curve to represent this data. Find the median and interquartile range for this data. . Example

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## Cumulative frequency

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**Example**The frequency table shows the examination marks of 80 students. Cumulative frequency • Draw a cumulative frequency table and cumulative frequency curve to represent this data. • Find the median and interquartile range for this data.**Example**The table below shows the results in a recent survey on the weights of boys in a particular school. a) Draw a cumulative frequency table and cumulative frequency curve to represent this data. b) Find the median and interquartile range for this data.**Example**The masses of 150 girls were obtained and placed in the table below. a) Draw a cumulative frequency polygon which represents this data b) Find the median mass for these girls c) Find the interquartile range for this data d) What percentage had a weight less than 47kg?**Example**The table below shows the age distribution of 200 people in a factory a) Draw a cumulative frequency curve to represent this data b) Use the curve to estimate the median c) What is the interquartile range for this data?

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