Visualizing Relationships - Data Points: Visualization That Means Something - page 203

FIGurE 6-22 Revised stem-and-leaf plot
Distribution Bars
Looking at the steam-and-leaf plot in Figure 6-22, you can spot frequency
in specific ranges. The more countries with a birth rate in a range, the
more numbers that are drawn, and the longer the row will be. Now flip
the plot on its side so that the rows become columns. The higher the col-
umn, the more countries there are in that range. Now change the column
of numbers into a simple bar or rectangle. Now you have a histogram, as
shown in Figure 6-23.