Queries about Logistic regression

Job ID: 35008168

Budget: ₹600 – ₹1,500 INR

Hi,

I wanted to know for a given sample of 250 how many minimum obaervations should be there per category of a nominal variable that would be one of the few independent nominal variables used in a binary logistic regression. Please also give peer reviewed reference.

If i have to do some tests, please advise how to do it on stata.
Related categories: Statistics Regression Testing