Re: [情報] WAR is the answer

作者: tlchen (台灣加油)   2013-02-20 11:27:14
※ 引述《abc12812 ()》之銘言:
: sport, like the world, is messy. But the bottom line is that WAR works. In
: 2012 the correlation between Baseball Prospectus' WAR and team victories was
: 0.86 (where 1.0 would have meant a perfect correlation). The correlation
: between batting average and victories was 0.27. Teams with more WAR win more
: games. Teams with better batting averages don't.
Sure. WAR is a better statistic than the batting average. I do not
think that many people disagree. You can check the correlation between
victories and the differences of the runs forced and the runs allowed.
It would give you a higher correlation. Does that mean R+RBI is a better
statistic for offensive players? Furthermore, WPA (win probability added)
would give you a perfect correlation to victories. Would you consider it?
There is no doubt that WAR is a good answer. But is it THE answer?
Could be, but little support from your long arguments.
: at a certain point, the question in any debate against science is: What are
: you really fighting and why?
You should ask this to yourself, and answer it seriously.
作者: GuyPearce (GuyPearce)   2013-02-20 12:59:00
context
作者: searoar (暗坑大豆)   2013-02-20 13:02:00
wut
作者: searoar (暗坑大豆)   2013-02-20 13:06:00
runs scored minus allowed has higher correlation??
作者: searoar (暗坑大豆)   2013-02-20 13:08:00
even if it's true, wut is that to say about R+RBI??
作者: searoar (暗坑大豆)   2013-02-20 13:09:00
WPA has a perfect correlation? have you done teh math?
作者: tlchen (台灣加油)   2013-02-20 13:37:00
For the same season (2012), Corr(RS-RA, W)=0.947
作者: tlchen (台灣加油)   2013-02-20 13:39:00
You wont believe that Corr(R+RBI, W)is about the same?
作者: tlchen (台灣加油)   2013-02-20 13:40:00
I said for offensive player, so I roughly divide eachrun to the player scores, and that the player drives in
作者: tlchen (台灣加油)   2013-02-20 13:41:00
Now, for the WPA, do you know the definition? Even if
作者: tlchen (台灣加油)   2013-02-20 13:42:00
you do not know, how about taking the total WPA of any
作者: tlchen (台灣加油)   2013-02-20 13:43:00
team to see if W=81+WPA? If you still do not believe
作者: tlchen (台灣加油)   2013-02-20 13:44:00
that correlation=1, you can check with any calculator
作者: tlchen (台灣加油)   2013-02-20 13:47:00
Sorry, I did not mean to say Corr(R+RBI,W), I meant
作者: tlchen (台灣加油)   2013-02-20 13:48:00
Corr(R+RBI,RS) is nearly 1, so I use it to evaluate theoffensive performance
作者: tlchen (台灣加油)   2013-02-20 13:49:00
I was not going to argue that R+RBI is better. I want
作者: tlchen (台灣加油)   2013-02-20 13:50:00
to say that it is better by the logic of the author
作者: searoar (暗坑大豆)   2013-02-20 13:50:00
http://tinyurl.com/a37ngwx not the nats but the giants
作者: tlchen (台灣加油)   2013-02-20 13:54:00
are you sure that you added both batting and pitching?
作者: searoar (暗坑大豆)   2013-02-20 13:56:00
R=RS and RBI≒R I am not sure wut u goona proof here
作者: searoar (暗坑大豆)   2013-02-20 13:58:00
OK, my bad, so u know the def of WPA
作者: searoar (暗坑大豆)   2013-02-20 13:59:00
but don't know wut it designed to answer?
作者: tlchen (台灣加油)   2013-02-20 14:20:00
I don't know what makes you think so. Anyway, whether I
作者: tlchen (台灣加油)   2013-02-20 14:22:00
I know or not is irrelvant. I just follow the author'slogic to present WPA as a superior statistic
作者: tlchen (台灣加油)   2013-02-20 14:24:00
For R&RBI, as I mentioned above, it would also be a
作者: tlchen (台灣加油)   2013-02-20 14:25:00
better statistic from his logic.
作者: Parazicecum (WTKD)   2013-02-20 20:36:00
my dick is so big
作者: star01 (運動宅 電影宅)   2013-02-20 22:18:00
mom, i am here

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