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Jun 28, 2020 at 13:22 comment added Robert Long As you said, the outcome is multinomial but there appears to be only one estimate, so there doesn't appear to be enough information to make a prediction. We would need to look into the workings of mcmcglmm.
Jun 28, 2020 at 13:15 comment added user11806155 So maybe I can manually calculate the predictive probability myself. Statistically, what would be the correct way of the calculation using the value of SES and ID?
Jun 28, 2020 at 13:11 comment added Robert Long @user11806155 That looks strange. You might want to ask on the r-sig-me mailing list because this site is for statistical questions, not for programming questions or questions about particular software.
Jun 28, 2020 at 12:31 comment added user11806155 I tried this, I get a strange error > predict(m1,data.frame(SES=0.5,School='1224'),marginal=NULL,type='response') Error in FUN(X[[i]], ...) : object 'mathach' not found
Jun 28, 2020 at 12:29 comment added user11806155 Thank you very much for the quick response. But mathach is a 3-category multinomial variable, would there be two equations with two different SES regression coefficients?
Jun 28, 2020 at 11:22 history answered Robert Long CC BY-SA 4.0