In reply to Rick Wicklin.

Cool. Do you have a link to the original data set?

If you look at a typical quantitative analysis/Analytical chemistry textbook, there is a statistical test for outliers called the Q-test. If the Q-test says a data point is an outlier, then you can remove it because it's an outlier. As a chemistry student, if I was presented the same data, I would be required to remove at least 1 outlier or I would fail the assignment.... Since I started taking stats, I've been fighting against this type of non-sense. I plan on using this data set to show why the Q-test is a really bad idea at a chem conference this summer.... and a few talks before then.