Parts of a Box Plot shows a diagram of a box plot. The bottom and top edges of the box indicate the interquartile
range (IQR). That
is, the range of values that are between the first and third
quartiles (the 25th and 75th
percentiles). The marker inside the box indicates the mean value. The line inside the box indicates
the
median value.
You can enable
outliers, which are
data points whose distances from the interquartile range are greater than 1.5 times the size
of the interquartile range.
The whiskers (lines protruding from the box) indicate the range of values that are
outside of
the interquartile range. If you do not enable outliers, then the whiskers extend to
the maximum and minimum values in the
plot. If you enable outliers, then the whiskers indicate the range of values that are
outside of the interquartile range, but are close enough not to be considered outliers.
If there are a large number of outliers, then the range of
outlier values is represented by a bar. The
data tip for the bar displays additional information about the outliers. To explore the outliers,
double-click on the outlier bar to view the values as a new histogram
visualization.