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Subject: Re: A question about statistics...

Author: Peter Fendrich

Date: 15:11:25 01/05/04

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On January 05, 2004 at 07:55:26, Dieter Buerssner wrote:

>On January 05, 2004 at 04:56:23, Dieter Buerssner wrote:
>
>>I tried with all different alternatives - your original formula, the one with
>>parentheses added and also with W^2. In either case, the calculated number does
>>not seem to make sense.
>
>Oops, sorry. The above should not have been in my post. I first miscalculated
>the numbers. They did make sense, after I calculated again (while writing the
>post).
>
>Regards,
>Dieter

Ok Dieter,
I'm relieved!
You were right about the parentheses.
The only trick to remeber here is to use the scores themselves to compute the
interval and translate it to rating differences. The rest is basic formulas for
the standard deviation.
Regards,
Peter



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