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Hey, I'm an R noobie and I have been trying calculate SSEr and SSEc in order to determine if there is sufficient evidence to include second-order terms in my model, but I have no idea what command to use. Any help with this would be much appreciated. -- View this message in context: http://r.789695.n4.nabble.com/Nested-Models-tp4637855.html Sent from the R help mailing list archive at