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Regarding regression analysis, I once heard that "Replicate at various predictor values will allow for lack-of-fit analysis". I do not understand how to get this kind of statement?

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(-1) I don't believe you've quoted your source accurately. Besides that, people will need to see more of the context in order to answer your question. – rolando2 May 2 '12 at 21:22
@gung I took my answer down because of the downvotes (even though I think my answers is appropiate). Unfortunately that took away our comments. Perhaps you should repeat your suggestions as they were good comments. – Michael Chernick Jul 20 '12 at 10:29
@Michael - FYI: only the OP and others in the comment thread are pinged with the '@' symbol, so gung did not see your comment unless he happens to have been reading this thread. – Macro Jul 20 '12 at 18:52

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