[R] aov and missing values

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Fri Nov 3 16:59:57 CET 2000

Peter Dalgaard BSA <p.dalgaard at biostat.ku.dk> writes:

> if some plots have missing values, but not only that: The error model
> also becomes dubious (it essentially implies that averages have the same
> variance no matter how many observations they are averages of). 

Oops, sorry. It's the other way around: It implies that the variance
of single observations is different in order to get the same ratio for
the variance of averages. I.e. the average of two observations is
always half that of one observation. If the within-plot observation is
small, then this becomes clearly unrealistic.

   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
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list