[R] ss's are incorrect from aov with multiple factors
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
> 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?
> John R. Gleason
> Associate Professor
> Syracuse University
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> Syracuse, NY 13244-2340 USA FAX: 315-443-4085
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