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Fisher exact - two tailed

by tenya (Beadle)
on Oct 02, 2001 at 06:45 UTC ( [id://116053]=perlquestion: print w/replies, xml ) Need Help??

tenya has asked for the wisdom of the Perl Monks concerning the following question:

Do you know of a Perl implementation of a two-tailed Fisher Exact test?

Replies are listed 'Best First'.
Re: Fisher exact - two tailed
by jeroenes (Priest) on Oct 02, 2001 at 07:58 UTC
      Statistics::Table::F does not seem to be a two tailed Fisher Exact test (but maybe I am missing something). I had searched cpan documentation for Fisher and came up empty handed. By the way there is a perl version of a one tailed Fisher exact test here.
        AFAIK, the ANOVA is a Fisher Exact test, two tailed. Aha, that test is a variation on the chi square. OK, I completely misunderstood your question. I'm only used to ANOVA kind of statistics ....

        (About that Statistics::Table::F module:) I must admit the docs of that module are very minimal. Moreover, I tried to install it, but that doesn't work. I'm sorry that I've given you a pointer that I never used myself.

        The BSP package seems to have a really specialized use of bigrams, I don't whether it can be used as-is for your application. (update) After paging through it, I still can't easily see where the bigram stops and the algoritm comes in.

        To make it up to you, I will program your F-test.

        Jeroen
        "We are not alone"(FZ)

        Update: There is javascript code to be found here.

        ...time passes and I have parsed that javascript into perl: Fisher's Exact test (probability of 2x2 tables)

Re: Fisher exact - two tailed
by mischief (Hermit) on Oct 02, 2001 at 17:55 UTC

    Just so this node might hold some kind of useful information for those who don't know what you're talking about (such as, uh, me for example :-): What is a two-tailed Fisher Exact test?

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