-  RA ch7 Multiple Regression 2Lecture note chapter 7 for regression analysis taught by Hyemin Gu in 2020 
-  RA ch6 Multiple Regression 1Lecture note chapter 6 for regression analysis taught by Hyemin Gu in 2020 
-  RA ch5 Matrix Approaches to Simple Linear RegressionLecture note chapter 4 for regression analysis taught by Hyemin Gu in 2020 
-  RA ch4 Diagnostics and Remedial MeasuresLecture note chapter 4 for regression analysis taught by Hyemin Gu in 2020 
-  RA ch3 Inferences in Regression and Correlation AnalysisLecture note chapter 3 for regression analysis taught by Hyemin Gu in 2020