Microsoft Office Tutorials and References
In Depth Information
Creating a box plot
Figure 8-47: Calculating the area under this curve requires
complex formulas.
Figure 8-48: Calculating the area under a sine curve, with varying numbers of
data points
Creating a box plot
A box plot (sometimes known as a quartile plot or a box and whisker plot ) is often
used to summarize data. Figure 8-49 shows a box plot created for four groups of
data. Each group has a diagram, the height of which represents the numerical range
of the data (minimum and maximum values). The “boxes” represent the 25th
through the 75th percentile. The horizontal line inside the box is the median value
(or 50th percentile). This type of chart enables the viewer to make quick
comparisons among groups of data.
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