Anyone knows how to perform a test for heteroscedasticity in a ordered probit model in R?
I tried to use bptest(model) and I tried plot(model, which=1), but these comands only seem to work for linear models..!
Based on a data set I have to answer whether the use of tele-diagnosis and tele-evaluation by health professionals in Andalusia has a positive impact in their perception of the technology usefulness.
I have the variables:
useful -how useful is tele-diagnosis and...
I have a dataset named bwght which contains the variable "cigs" (cigarattes smoked per day)
When I calculate the mean of cigs in the dataset bwght using: mean(bwght$cigs), i get a number 2.08.
Only 212 of the 1388 women in the sample smoke (and 1176 does not smoke)...