[R] Large F-value and small P-value

[Peter Dalgaard BSA]

Sven Garbade <garbade at psy.uni-muenchen.de> writes:

> Hi all,
> I computed a Wilks Lambda Test with manova:
> 
> > df.man <- manova(df.mul ~ 1, na.rm=TRUE)
> 
> > summary(df.man, intercep=T, test="Wilks")
>             Df     Wilks approx F num Df den Df  Pr(>F)  
> (Intercept)  1 0.0002824    393.3      9      1 0.03911 *
> Residuals    9                                           
> ---
> Signif. codes:  0 `***' 0.001 `**' 0.01 `*' 0.05 `.' 0.1 ` ' 1 
> 
> I'm wondering about the very high F value and the comparative low p
> value. 

You mean large p, I suppose. 

You don't see F tests with 1 DF in the denominator every day.
Fisher+v.Belle lists the 95% quantile for F(9,1) as 240.5, so I
wouldn't worry...

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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