[rufibarbatus]

Holy cow, I did the exact same thing as you!

For the sake of completeness, my first steps before sorting and plotting were to:

  1. take the mean, median and mode of each set,
  2. try and fail to use more sophisticated statistical analysis [1],
  3. have a look at the minimum and maximum value for each set.

By #3 I already had a good enough guess, but I felt I had to see it.

[1] In fact, could anyone point me to a refresher? I'm talking about distribution curves, regression, that kind of thing. I seem to have lost hang of it — couldn't pass my own "5 minutes to implement the simple thing" criterion.