#1
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Math questions
I have some questions regarding winning %.
Question 1 Team A is .600 against .500 team. Team B is .400 against .500 team. What is Team A's winning% against Team B? Question 2 Team A is .550 against average .450 teams. What is Team A's winning % against .500 teams. I have been using simple methods for both questions. Question 1 .600-.400+.500=.700 Question 2 .550+.450-.500=.500 However I have been feeling it is not accurate. Is there any better methods for these question? Thanks. |
#2
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Re: Math questions
[img]/images/graemlins/shocked.gif[/img]
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#3
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Re: Math questions
What does that mean?
So Can you describe and justify any methods on this matter? I assume you can not. |
#4
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Re: Math questions
team a with .450 record isn't equal to team b with .450 record
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#5
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Re: Math questions
[ QUOTE ]
I have some questions regarding winning %. Question 1 Team A is .600 against .500 team. Team B is .400 against .500 team. What is Team A's winning% against Team B? Question 2 Team A is .550 against average .450 teams. What is Team A's winning % against .500 teams. I have been using simple methods for both questions. Question 1 .600-.400+.500=.700 Question 2 .550+.450-.500=.500 However I have been feeling it is not accurate. Is there any better methods for these question? Thanks. [/ QUOTE ] 60%/40% = 1.5 40%/60% = 0.66667 (2/3) 1.5/0.66667 = 2.25 2.25/3.25 = 69.2% Imagine you have 60 red balls and 40 white balls. You put them all in a tub and randomly select 1. Whatever color is selected is the winning color. Red will win 60% of the time. Take those 40 white balls out and put them into a tub with 26.66667 blue balls (yes, blue balls). Just pretend there is such a thing as 2/3 of a ball, instead of making me talk about millions of balls. The white balls will win 60% of the time now. Take those 26.6667 blue balls out and put them into the tub with the 60 red balls. Red will win 69.2% of the time. |
#6
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Re: Math questions
i did math once and it hurt, so's i took up golf.
damn, that hurt, too. -c |
#7
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Re: Math questions
I suggest reading this post: http://forumserver.twoplustwo.com/sh...6755&page=
which is a post concerning (or correcting) the article I wrote on NFL power ratings: http://www.twoplustwo.com/magazine/issue33/yao0907.html (edited just to make the links active -P) |
#8
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Re: Math questions
i'm just going to throw my question here.....
how do i calculate power ratings? can i do i relatively easily in microsoft excel? or do i need special software?... thinking about doing power ratings for canadian football. thanks in advance!! |
#9
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Re: Math questions
You should be using a log5 method IIRC. I don't have the stuff in front of me. But I think Tom Tango does a good treatment of this (and Bill James... Damn where did I read this?)
Boom. http://www.insidethebook.com/ee/inde..._ratio_method/ That should be what you need to calc this type of thing. Note: After reading through Yao's post, it seems to be what he is saying. |
#10
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Re: Math questions
Thank you for answering my questions.
These articles King Yao and Thremp linked helped me a lot. |
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