1
vote
1answer
52 views

Is the statistical significance of a regression meaningful if it has poor out of sample performance?

I want to determine the significance of a particular variable, among many confounders. If I fit a model on the training set and observe a small p value, should I discard the model because it ...
1
vote
1answer
81 views

How to validate “equal slopes” (proportional odds) in ordinal regression

I would like to fit an ordinal regression model using proportional odds. I learned to test for "equal slopes" in order to say something about the model's validity. Therefore, I fit a model with equal ...
2
votes
0answers
49 views

Validating previous analysis with new data

I am interested in trying to validate some results from a previous experiment. The experiment involves selecting probes of interest that separate our two populations of interest, e.g. smoker vs. ...