Re: [S] strange p-value for Fisher exact's test

Chris Evans (
Tue, 24 Mar 1998 23:19:35 +0100

On 24 Mar 98 at 14:48, Anne York wrote:

> Not a Pentium problem. These were run in Splus 3.4 on an SGI
> with an Irix operating system:
... rest snipped ....

Doesn't occur for me with 4.0r3 on a Pentium Pro NT4sp3 machine:

> fisher.test(matrix(c(1,1,71,71),nc=2))

Fisher's exact test

data: matrix(c(1, 1, 71, 71), nc = 2)
p-value = 1
alternative hypothesis: two.sided

Strange pattern emerging -- someone doing the crosstab stats?!


Chris Evans, Senior Lecturer in Psychotherapy,
Locum Consultant to the
Prudence Skynner Family Therapy Clinic,
St. George's Hospital Medical School, London University
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