Final report figure 9 suggested improvements

[ttimbers]

I wonder whether the difference between low- and high-complex projects can be explained simply by the project size... I know they are all > 100 commits, however, even in that group there could be great size differences... Thus, I wonder if getting a ratio for each of these metrics is a fairer comparison. For example, for each project calculate the # issues / # commits in the repo. If the same relationship holds when you do this to try to account for the potential size differences, then there really might be something interesting that is different between low- and high-complex projects.