[R] Different results

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From: vasilis pappas (vasileios_p@yahoo.gr)
Date: Fri 28 May 2004 - 08:44:03 EST


Message-id: <20040527224403.27841.qmail@web12908.mail.yahoo.com>

Hello everybody,
   I've been practicing with some data in R and SPSS and I noticed that there are some differences in ANOVA results.
 
For example with :
y<-c(1,2,34,2,3,45,2,1,67,3,2,67,2,2,98,4,4,23,1,1,23,2,3,45) and
x<-rep(c(1,2,3),8)
 
   I get in R ( with summary(aov(y~x)) )
MSres=350.7
df=22
 
   while in SPSS I get
MSres=221.9
df=21
 
Can enyone explain me what is the problem or what am I doing wrong?
                         Thanks for your interest a priori,
                                                                       Vasileios.

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