MathBench > Environmental Science

Sampling

 

Proving Polluted Ponds the Elegant waybacteria

 

 

Finally, my favorite way to show this kind of data is to "collapse" the bars down into two columns of dots. Try this below by dragging each of the blue dots to its correct location on the graph.

 

 

(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.)