[R] strange fisher.test result

From: Williams Scott <Scott.Williams_at_petermac.org>
Date: Sat 31 Mar 2007 - 13:36:04 GMT


A simple question - using the following fishers test it appears that the P value is significant, but the CI includes 1. Is this result correct?  

> data.50p10min <- matrix(c(16,15, 8, 24),nrow=2)

> fisher.test(data.50p10min)
 

        Fisher's Exact Test for Count Data  

data: data.50p10min

p-value = 0.03941

alternative hypothesis: true odds ratio is not equal to 1

95 percent confidence interval:

  0.9810441 10.7771597

sample estimates:

odds ratio

  3.138456  

Thanks for comments  

Scott


Dr Scott Williams MD

Peter MacCallum Cancer Centre

Melbourne Austrailia



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