Cumulative frequency is plotted on the vertical axis ... The interquartile range is a measure of how spread out the data is. It can be more useful than the range because it does not include ...
Cumulative frequency is plotted on the vertical axis ... The interquartile range is the upper quartile – the lower quartile, so for this data the interquartile range is \(47 – 38 = 9\).
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