[R] Genstat into R - Randomisation test

[Mike Lawrence]

I was taught that Fisher proposed the F-test as a computationally
simpler approximation to what he called a "Randomization test",
consisting of exhaustive permutations. I never looked at the original
Fisher reference myself, so this may be false.

However, I haven't observed a consistent nomenclature when I have seen
these tests discussed, so I typically ensure to mention whether what
I'm doing is exhaustive or non-exhaustive.

I do see the value in your interpretation, and think it makes sense to
drop "randomization"  as a name (despite it's possible historical
significance) and start using "exhaustive permutation test" (to
contrast with "non-exhaustive permutation test").


On Wed, Apr 8, 2009 at 1:18 PM, Peter Dalgaard <p.dalgaard at biostat.ku.dk> wrote:
> Mike Lawrence wrote:
>>
>> Looks like that code implements a non-exhaustive variant of the
>> randomization test, sometimes called a permutation test.
>
> Isn't it the other way around? (Permutation tests can be exhaustive by
> looking at all permutations, if a randomization test did that, then it
> wouldn't be random.)
>
>
> --
>   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
>  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
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>



-- 
Mike Lawrence
Graduate Student
Department of Psychology
Dalhousie University

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~ Certainty is folly... I think. ~