To calculate the cumulative frequencies ... Reading from the graph, the upper quartile is 47. The interquartile range is the upper quartile – the lower quartile, so for this data the interquarti ...
A cumulative ... upper quartile, use \(\frac{3}{4}\) instead. \(\frac{3}{4}\) of 40 = 30. Read across at 30 and down. The upper quartile is about 47 cm. The interquartile range is the upper ...
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