[R] significance of character (Anova)

[peter dalgaard]

On Aug 13, 2012, at 15:38 , Jennifer Kaiser wrote:

> > Model: poisson, link: log
> > 
> > Response: sb_ek_ber
> > 
> > Terms added sequentially (first to last)
> > 
> > 
> >          Df  Deviance Resid. Df Resid. Dev  Pr(>Chi)    
> > NULL                    1237837 4.4998e+10              
> > ABWHALT_C  2 244353722  1237835 4.4754e+10 < 2.2e-16 ***
> > Wuerfel    5  63772679  1237830 4.4690e+10 < 2.2e-16 ***
> > 
> > Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 
> > There were 50 or more warnings (use warnings() to see the first 50)
> > 
> > The thing is that the caracter "Wuerfel" is random generated  
> > and it shouldn' t  be significant.
> > 
> > It would be realy great if you could help me. 
> 
> 
> >The most obvious guess is that sb_ek_ber probably is not Poisson distributed. 
> 
> I tried it in another statistical  programm and I got the values that I expected but for my bachelortheses I need to do it in R.
> 

And what do you expect us to do with that bit of information?

Did you check the distribution of the response variable? For all we know, it might have values of 99999 indicating missing values to "another statistical program".


-- 
Peter Dalgaard, Professor
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com