I tend to agree with JohnsonsJerseys here. The difference between CC and BSU, on average is 6 people. The difference between CC and UAA is less than 100. The only real "outliers" are Minnesota and Mankato (not including UNO due to sample size). Why is Mankato's average attendance so much lower than say UAA's? Certainly the fan base could care less between Mankato and UAA, and it would also certainly seem that Mankato's fanbase would be able to make the trip to the Ralph far easier than UAA's fanbase, so why is there such a difference? The answer is that UND has played Mankato in the first round of the WCHA playoffs (no student section, generally less-attended than regular season games) for a total of 5 games (or nearly 1/4 of the times we've played Mankato at home in this stretch). The attendance at those games?
8,048
9,258
9,371
9,963
10,288
If you take those games out of the sample for Mankato, their average is 11,342. The amount of games UND has played against UAA in the First Round of the WCHA Tourney? 0.
My thesis is that, at least for North Dakota, it does not really matter who they play, but rather it matters when the game is played, and how good North Dakota is, or at least how good they are perceived to be. This is why Michigan Tech's numbers aren't similar to Mankato's despite the fact that we've played Tech 9 times in the WCHA playoffs at the Ralph. 3 of those series (2004, 2009, 2011) were WCHA Championship years, and the other (2008) we were generally regarded as the top team out of the WCHA.