search for: q51

I am learning R via a textbook that performs analysis with SPSS and SAS. In trying to reproduce the results for an ordinal logit model, I get very similar point estimates for my cut-off points, but the parameters for the covariate q60 do not match. The estimate for q51 also matches. Is this because I need to change a base case for the ordered covariate q60? Can this be done in or is it always the first case? mod<-polr(as.ordered(q43j)~as.ordered(q60)+q51, method="logistic") Perhaps a book using R would be a better idea, but it's the content and...

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