This map, or, better yet, chart type, is known as a stem and leaf plot. With these types of plots, we can map out large amounts of numbers that we have. Say, for example, we are doing a study where we have 50 trials where we are counting the number of live bugs present in an experiment about the lethality of various bug sprays. In each of these fifty trials, we come out with a number. Now, what to do with all of these numbers? Stem and leaf plots allow us to plot all of these numbers out. In this type of plot, we look at the infant mortality rates in Africa. We have the first two numbers in the set on the "stem" side. And the number in the ones digit place are on the leaf place. For instance, the first number in the set has a 5 in the stem place and a 1 in the leaf place. This number represents 51. and the last number had 15 on the stem and a 1 on the leaf, this is 151. When there are times that we have a number in the stem, but none in the leaf, that means that there are no data for those numbers. For example, we see a 6 in the stem and none in the leaf, this means that there are no data between 60 and 69. Therefore, we are able to convey a vast number of data points together in one cohesive plot.
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