Also try a multiway dot plot, superposing different plotting symbols on a single set of axes. Use a linear scale for concentration.

Also try a multiway dot plot, superposing different plotting symbols on a single set of axes. Use a linear scale for concentration. B. Now construct and juxtapose dot plots using a logarithmic scale. Is the log or the linear scale more appropriate for the comparison at hand, and why? C. Compare the two sites by means of a Tukey mean-difference graph.