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tmpwatch
2011 Mar 10
0
confidence intervals when using polr()
...e used interval="confidence",
level=.095 and then interval = "prediction". Below is a sample of my data
and my code I am trying to run (its from an open access public data set; I
tried to make the size as small as possible, sorry for its length).
polr.result<-polr(ordered(tvwatch)~ses+testscores,method="probit",Hess =
T,data=testdata)
polr.predict<-predict(polr.result,type="probs",interval="confidence",level=.
95)
structure(list(tvwatch = c(2L, 2L, 1L, 4L, 2L, 4L, 3L, 2L, 3L,
2L, 3L, 4L, 4L, 3L, 4L, 3L, 2L, 1L, 3L, 1L, 2L, 3L, 4L, 4L,...