The interquartile range (IQR) is therefore 18 - 4 = 14. You will notice that the fact there is an outlier in this data (60) which has had no bearing on the calculation of the interquartile range.

Outliers that differ significantly from the rest of the dataset may be plotted as individual points beyond the whiskers in the box plot. Box plots can be drawn either horizontally or vertically. The ...

You can augment a chart for individual measurements with one of several graphical displays, such as a histogram or a box-and-whisker plot. These displays summarize the measurements plotted on the ...

Also known as a box plot, box and whisker charts show you the distribution of data and any outliers. They're also good for ...