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Subject: OFF TOPIC: About Ratings and probabilities, plus a question

Author: Paulo Soares

Date: 14:53:10 01/22/01


Jeff Lischer taught me the standard formula for the
win expectancy (We) for a program x to win a
program y, below placed:

We = 1/(1 + 10^((delta rating)/400))
where (delta rating) = rating y - rating x

I remember another formula that considered a certain error
margin. I am almost sure that that formula was already shown
here several times for some people, perhaps Dann Corbitt,
Bruce Moreland or Uri Blass?
Does anybody remember that other formula?

Thanks in avdanced,

Paulo Soares, from Brazil



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