If memory serves, Bill Venables said in the paper cited several times here, that there's only one type of sums of squares. So there's only one type of "ANOVA" (if I understand what you mean by ANOVA).
Just forget about the different types of tests, and simply ask yourself this (hopefully simple and straight forward) question: Which pair of models when compared will answer the question you have at hand? It's not sufficient to just ask: "Is factor X significant?" It depends on what else is in the model you're entertaining. I think it's high time to retire the archaic concept of the different types of sums of squares. IMHO they are the biggest red herrings in Statistics. Best, Andy From: Ravi Kulkarni > > Hello, > I think I am beginning to understand what is involved in > the so-called > "Type-I, II, ..." ANOVAS (thanks to all the replies I got for > yesterday's > post). I have a question that will help me (and others?) understand it > better (or remove a misunderstanding): > I know that ANOVA is really a special case of regression where the > predictor variable is categorical. I know that there can be > various types of > regression models commonly called "stepwise, add, remove...", > where one > controls which predictors are added to the regression model > and in what > order. > Is this what the various "Types" of ANOVA correspond to? I > mean that I > think of my ANOVA as a regression model (a General Linear > Model) and the > various ways of entering predictors as the various ANOVA "Types". > Hope that makes sense... > > Ravi Kulkarni > -- > View this message in context: > http://n4.nabble.com/ANOVA-Types-and-Regression-models-the-sam > e-tp1574654p1574654.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > Notice: This e-mail message, together with any attachme...{{dropped:10}} ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
