How the Manilla Groups Stack Up to One Another

I took ranking data from Noxville's site and GosuGamers ( I wanted as many data points as I could find) and compiled it to rank the groups relative to one another. You can see the full data here.

I averaged each rating type (ELO, glicko, etc.) within each group and then subtracted the tournament average to rank each group for each rating type. The total difference is the sum of these values for each group.

Disclaimer: I did not normalize the different ratings against each other, so glicko inherently has a stronger weighting than the other ratings.

| Total Difference | Average Rank ---|---|---- Group A| 190.91 | 1.67 Group B | -202.72 | 3.50 Group C | 234.61 | 1.33 Group D| -225.05 | 3.50

The result is probably fairly expected by anyone who follows competitive dota, although I found it interesting that according to this Group B and D are equally shitty and apparently Group C is slightly harder than Group A. I know next to nothing about stats and probably did a million things wrong, so feel free to tell me how much of an idiot I am.