[R] Wilcoxon test p value with one decimal place

[Bert Gunter]

On Thu, Feb 16, 2012 at 10:15 AM, Jun Shen <jun.shen.ut at gmail.com> wrote:
> Dear list,
>
> Let's say I have data
>
>  a=c(37.961,38.214,57.68)
>  b=c(77.56,61.875,67.683)
>
> wilcox.test(a,b)
>
> the wilcoxon test only gives me a p value with one decimal place. Is this
> normal?

No, it's discrete  :-)

(Actually, that's the answer. Read up on the Mann-Whitney test to see why).

-- Bert

Thanks.
>
> Jun
>
>        [[alternative HTML version deleted]]
>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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