[R] Why two chisq.test p values differ when the contingency table is transposed?
Tao Shi
shitao at hotmail.com
Tue Jul 15 21:18:59 CEST 2003
I'm using R1.7.0 runing with Win XP. Thanks,
...Tao
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>x
[,1] [,2]
[1,] 149 151
[2,] 1 8
>t(x)
[,1] [,2]
[1,] 149 1
[2,] 151 8
>chisq.test(x, simulate.p.value=T, B=100000)
Pearson's Chi-squared test with simulated p-value (based on 1e+05
replicates)
data: x
X-squared = 5.2001, df = NA, p-value = 0.03774
>chisq.test(t(x), simulate.p.value=T, B=100000)
Pearson's Chi-squared test with simulated p-value (based on 1e+05
replicates)
data: t(x)
X-squared = 5.2001, df = NA, p-value = 0.01642
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