aov and missing values
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 _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._