How to compare two simple regression models? Say I have two regression models:
- Model 1: $Y= c+X_1+X_2$
- Model 2: $Y= c+X_3+X_4$
How to test null hypothesis that both of these models have equal explanatory power? $R^2s$ I get are pretty close (.044 & .042). Is there any way to do an F-test if models are not nested?