OLS regression model.
- http://www.estat.us/sas/OLS.doc (My old writing)
- How to understand and test statistical interaction effect
- Advice on how to understand OLS regression. Try to type up a simple program that runs OLS regression model using matrices. This is my SAS example: http://www.estat.us/sas/stat_IML_OLS.txt If you succeed, you will realize the algorithm itself is simple.