+ 1. What kind of graph is this?
+ 2. In the plot, What do the five horizontal lines for each group represent?
+ 3. What does the graph tell us about the shapes of the distributions?
+ 4. What can we conclude from this figure?
+ 5. Why are there a number of observations shown as isolated points?
+ 6. How could the data be plotted so as to take the paired structure into account?
+ 7. What might such a plot obscure and what might it reveal?
Lumb, A.B. and Vail, A. (2000) Difficulties with anonymous shortlisting of medical school applications and its effects on candidates with non-European names: prospective cohort study. British Medical Journal 320, 82-5.
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Last updated: June 29, 2005.