Applets: Watch a stemplot being made ||| Investigate choices
Watch: Use this to see how to make a stemplot from given data. The choices on the right allow you to do it with just a few values or to make it slower, if you need to.
You can also choose to have your data drawn from populations of different shapes. You can investigate all three shapes by choosing a fairly large sample size from each of them, in turn. You'll want to make the speed fast if you choose a large sample size!
Investigate:: Use this to investigate the effect of splitting stems. To begin, choose 50 random values to populate your table of values and make a stemplot. Then split the stems both possible ways to see the differences in the appearance of the stemplot. There is no strict rule about when you should split stems. One "rule of thumb" is that frequency graphs, such as stemplots, should have between 6 and 20 stems in order to adequately show the shape. What "looks useful" will depend, to some extent, on the number of values as well as the number of bins.
Information about entering data. (The Investigate applet here allows you to put in your own data, but the Watch applet does not.)
Home | Overview of Frequency Graphs
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