Wednesday, October 7, 2009

Approximate odds of Yanks winning the 2009 World Series

The following ignores several effects, just a simple estimate!

Yanks win % over Minn = 0.600 in one game (based on regular season).
In THREE-game series, add up P for the winning 4 of the 8 sequences, get 0.650
In 5-game series, add up P for the winning 16 of the 32 sequences, get 0.683
(binomial distribution ==> P=0.710   for 7-game series)
Add a bit for 5th game at home ==> 0.700
Strength of 3 starters ==> maybe 0.750.
AL-East is stronger, ==> make it 0.800

In 2nd and 3rd (7-game) series, crudely estimate 0.60 and 0.70

0.80 * 0.60 * 0.70 = 0.34 (34% chance of winning WS).

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