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Re: Fisher's Exact Testby resonator (Initiate) |
on Apr 18, 2007 at 17:41 UTC ( [id://610806]=note: print w/replies, xml ) | Need Help?? |
Hi.
Have you checked the results of your code for Fisher's Exact Test? I don't think it produces correct results. Here's a utility that produces results identical to those I calculate: http://www.exactoid.com/fisher/index.php This expression at the beginning of your code seems odd: It simplifies to: $test = $a*$d - $b*$c; I don't follow why you have this: For example, if a = 1, b = 50, c = 10 and d = 5, P(one-sided) = P(two-sided) = 1.4386e-07, not 1. Nevertheless, thanks for the tip about calculating factorials only once. Let me know if I've misunderstood something.
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