Re: st: RE: Fisher's exact test

[Gwinyai Masukume <parturitions@gmail.com>]

Many thanks Joe.
Gwinyai

On 4/3/14, Joe Canner <jcanner1@jhmi.edu> wrote:
> Gwinyai,
>
> I'm no expert, but it's probably worth looking at the discussion letter by
> Richardson that was published in response to the Lyderson article (see
> http://www.ncbi.nlm.nih.gov/pubmed/21432882). He has quite a strong negative
> review of Lyderson's article and includes some references to support his
> contentions.
>
> From what I can gather the "less than 5" rule was somewhat arbitrary and is
> now out of date.  Increased computing power has allowed for a more precise
> understanding of the various alternatives. You should familiarize yourself
> with the recent relevant literature and then do your best to apply what you
> have learned.
>
> Regards,
> Joe Canner
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Gwinyai Masukume
> Sent: Thursday, April 03, 2014 12:31 PM
> To: statalist
> Subject: st: Fisher's exact test
>
> Hi,
>
> According to some experts, "The traditional Fisher's exact test should
> practically never be used."
>  Lydersen S, Fagerland MW, Laake P. Recommended tests for association
> in 2 x 2 tables. Stat Med. 2009; 28(7):1159-75.
> http://www.ncbi.nlm.nih.gov/pubmed/19170020
>
> The convention seems to be if any of the boxes in a 2x2 table has less
> than 5 entities Fisher's exact test should be used.
>
> When is it correct/appropriate to use Fisher's exact test?
>
> With thanks,
> Gwinyai
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