After updating my post-season analysis with the results of last night's game, so that we now have a World Series victor for 2005, it appears that:
1) the wild card team is still not significantly more likely to make it to the World Series or to win it (chi-squares: .727 and .866).
2) the team with the best record in its respective league is significantly more likely to make it to the World Series (chi-square: 3.96, significant at the 5% level) . . .
3) . . . but is not significantly more likely to win the World Series (chi-square: .866).
4) wild card teams are not significantly more likely to win a division series, but the team with the best record in its league is (chi-squares: .97 and 3.88).
Of course, none of this tell us how much more likely these outcomes are. That would need a degree of analysis that I haven't the time to undertake at the moment.
The punchline: n=80 is not a very big number at all, and n=88 isn't either. We'll need several more years of the modern post-season before we can actually draw any really important conclusions about the wild card's effect on baseball's seasonal results.
[Posted with ecto]
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