Example
Recall again the seed germination Example 1. Since the data has a range of
9, an interval width of 2 (= 0:2101) seems reasonable. To form the plot,
draw a vertical line towards the left of the plotting area. On the left of this
mark the interval boundaries in increasing order, noting only those digits that
are common to all of the observations within the interval. This is called the
stem of the plot. Next go through the observations one by one, noting down
the next significant digit on the right-hand side of the corresponding stem.