To calculate the cumulative ... quartile is 38. To find the upper quartile, find \(\frac{3}{4}\) of 40, which is the 30th value. Reading from the graph, the upper quartile is 47. The interquartile ...
The interquartile range is the upper quartile – the lower quartile ... cumulative frequency Drawing a box plot from a cumulative frequency graph is straightforward as long as the median and ...
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