[R] shipro.test

Achim Zeileis zeileis at ci.tuwien.ac.at
Mon Feb 17 19:09:02 CET 2003

On Monday 17 February 2003 18:57, Korponai János wrote:

> Hi,
> I am newby to R. I run this test (shapiro.test(rt(2000,30))) (R :
> Copyright 2001, The R Development Core Team Version 1.3.1 
> (2001-08-31))

That version is ancient...by now there is R 1.6.2

> for several times and results were different.
> Why do the shapiro.test produce different outputs?

If you generate random numbers by rt() you would
expect the output to be different in each run, wouldn't you?

If you generate the random numbers first:
R> x <- rt(2000,30)
and then run the test
R> shapiro.test(x)
it will indeed produce stable results.

> Thanks,

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