How many matches are really needed to determine final rankings?

[Ether]

Originally Posted by tctc

I started with the 10,000 Lakes and North Star Regionals since that is where I am located. But I expanded the analysis to include Colorado, Ventura (since they have 12 matches), Silicon Valley (since I heard the average qualification score was high), Wisconsin (close to MN), UNH District (12 matches), and New York City (many teams, only 8 matches).

I wonder how different the analysis would look if you looked at partial OPRs instead of partial average scores.

I put together partial OPRs for each of the 8 events you listed above, in case someone is interested enough to plot them or otherwise analyze/summarize them.

If this looks interesting/promising, I will generate partial OPRs for all 106 events thus far (Weeks 1 through 6).

Column A is team number, Column B is final OPR (after all Qual matches), Column C is partial OPR after all Qual matches less one, etc

Some of these events have surrogates and some have DQs. I ignored this information and included those scores in the OPR computations.