@ Citrus Dad:
If you are reading this thread, would you please weigh in here and reveal what you mean by "
the standard errors" of the OPRs, and how you would compute them, using only the data in
the example I posted?
Also, what assumptions do you have to make about the data and the model in order for the computed standard errors to be statistically valid/relevant/meaningful, and what is the statistical meaning of those computed errors?