[R] ss's are incorrect from aov with multiple factors

Spencer Graves spencer.graves at pdf.com
Sat Jul 12 03:00:52 CEST 2003

Dear John Christie:

	  People tend to get the quickest and most helpful responses when they 
provide a toy problem that produces what they think are anamolous 
results.  This increases the chances that someone will be able to 
provide a sensible answer in the few seconds they have available for 
your question.  Often, the process of preparing a toy problem leads them 
to an answer to their question.

	  Sorry I couldn't be more helpful.  spencer graves

JRG wrote:
> On 11 Jul 03, at 21:20, John Christie wrote:
>>	I have been trying to work with error terms given back from aov to 
>>make confidence intervals.  However, the numbers seem to be incorrect.  
>>If there is more than one term in the ANOVA then the error terms can be 
>>inflated by the number of factors in the extra terms.  The F's are 
>>correct so it is right back to the SS.  I was wondering if this is 
>>standard practice for stats programs or unique to R?
>>R-help at stat.math.ethz.ch mailing list
> In what sense are the SSs "incorrect", exactly?  And what do you think the "correct" values should be?
> ---JRG
> John R. Gleason
> Associate Professor
> Syracuse University
> 430 Huntington Hall                      Voice:   315-443-3107
> Syracuse, NY 13244-2340  USA             FAX:     315-443-4085
> PGP public key at keyservers
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help

More information about the R-help mailing list