Proving Polluted Ponds the Elegant way
Finally, my favorite way to show this kind of data is to "collapse" the bars down into two columns of dots. Watch how this is done below.
(This kind of plot is easy to make by hand, but a little tricky in Microsoft Excel. What I do is code all the clean ponds with a "1", and all the polluted ponds with a "2". Then I ask Excel to make a scatterplot (or x-y plot) of the data. Finally I turn the x labels (which are 1 and 2) white, and type the correct label over them. Or if this doesn't make any sense, just stick to making it by hand.)
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