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

JRG loesljrg at accucom.net
Sat Jul 12 02:38:13 CEST 2003

On 11 Jul 03, at 21:20, John Christie wrote:

> Hi,
> 	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?
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In what sense are the SSs "incorrect", exactly?  And what do you think the "correct" values should be?


John R. Gleason
Associate Professor

Syracuse University
430 Huntington Hall                      Voice:   315-443-3107
Syracuse, NY 13244-2340  USA             FAX:     315-443-4085

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