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...he description of the hypotheses for type-III tests is even more complex if there are covariates. In my opinion, researchers are usually interested in the hypotheses for type-II tests. These matters are described in detail, for example, in my applied regression text <https://www.john-fox.ca/AppliedRegression/index.html>. I hope this helps, John -- John Fox, Professor Emeritus McMaster University Hamilton, Ontario, Canada web: https://www.john-fox.ca/ -- On 2024-08-07 8:27 a.m., Brian Smith wrote: > [You don't often get email from briansmith199312 at gmail.com. Learn why this is import...

Hi, Thanks for this information. Is there any way to force R to use Type-1 SS? I think most textbooks use this only. Thanks and regards, On Wed, 7 Aug 2024 at 17:00, Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > > On 2024-08-07 6:06 a.m., Brian Smith wrote: > > Hi, > > > > I have performed ANOVA as below > > > > dat = data.frame( > >