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Fisher test problem

As you say, I guess that's not possible. Meanwhile I've got R's results verified in Stata

. tabi 17 6 \ 2 1, chi2 exact

           |          col
       row |         1          2 |     Total
-----------+----------------------+----------
         1 |        17          6 |        23 
         2 |         2          1 |         3 
-----------+----------------------+----------
     Total |        19          7 |        26 

          Pearson chi2(1) =   0.0708   Pr = 0.790
           Fisher's exact =                 1.000
   1-sided Fisher's exact =                 0.627

The OpenEpi.com output was: (note the 2 tailed P value (fisher test))

Chi Square and Exact Measures of Association
	Test	Value	p-value(1-tail)	p-value(2-tail)
	Uncorrected chi square	0.07083	0.3951	0.7901
	Yates corrected chi square	0.1813	0.3351	0.6702
	Mantel-Haenszel chi square	0.06811	0.3971	0.7941
	Fisher exact		0.6273	1.25
	Mid-P exact		0.3971	0.7942

Thanks for pointing it out.. Had been under the notion that OpenEpi was very... strong (being associated with EpiInfo and WHO).

Viju
Tal Galili wrote: