The box plot may also identify outliers and possibly the mean.

A plain-text version might look like this:

+-----+-+ * o --------| + | |---- +-----+-+For this data set (values are approximate, based on the figure):+---+---+---+---+---+---+---+---+---+---+ 0 1 2 3 4 5 6 7 8 9 10

- smallest observation (
*minimum*) = .5 - lower quartile = 7
- median = 8.5
- upper quartile = 9
- largest observation (
*maximum*) = 10 - mean = 8
- the value 3.5 is a "mild" outlier
- the value .5 is an "extreme" outlier
- the smallest value that is
*not*an outlier is 5 - the data is skewed to the left (
*negatively skewed*)