This video takes the working model developed from round 1 of stepwise selection linear regression and uses this to develop the final model. Covariates that were not retained during round 1 are reintroduced iteratively in round 2. PROC GLM is used to make iterative models and comments are made in the code to help keep track of the decisions between iterations.
- [Instructor] Now we are at the next phase … of building our linear regression model. … This code named 515_Stepwise Selection Linear Round 2, … is in your exercise files. … Let's look at the first Model in it. … See this note? … It means we are on Model 21. … I don't reset the numbering. … Model 20 is the working model that came out of round one. … And Model 21 is the first model I will run … to try to break the working model. … See this PROC GLM code? … The first three lines of the code represent … my working model, Model 20, which is at the end … of the code from the last movie. … Let's look at what's in it. … Obviously DIABFLAG is there. … But we still have AGE4 through six, … HISPANIC and all the race indicator variables, … the marital status of FORMERLY MARRIED, … meaning widowed or divorced, … the highest level of education of SOME COLLEGE, … having ASTHMA, being OVERWEIGHT, or OBESE, … being a SMOKER, … and having either FAIR or POOR general HEALTH. … So that sounds like a grab bag, …
Author
Monika Wahi
Released
4/2/2019- Preparing for linear regression
- Creating plots for testing assumptions
- Linear regression modeling
- Interpreting the linear regression model
- Logistic regression modeling
- Presenting linear and logistic regression models
- Issues in regression
Skill Level Intermediate
Duration
Views
-
Introduction
-
Introduction to the course1m 52s
-
What you should know3m 2s
-
-
1. Preparing for Linear Regression
-
Basic PROC GLM code3m 7s
-
Reading PROC GLM output5m 56s
-
2. Linear Regression Modeling
-
Linear regression: Round 16m 32s
-
3. Preparing for Logistic Regression
-
Outcome distribution2m 29s
-
Basic PROC LOGISTIC code3m 39s
-
4. Logistic Regression Modeling
-
Logistic regression: Round 15m 52s
-
5. Model Presentation
-
6. Issues in Regression
-
Interaction review6m 56s
-
7. Regression Tips
-
Choosing reference groups5m 10s
-
Conclusion
-
Review of the process2m 50s
-
Next steps5m 40s
-
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.
Share this video
Embed this video
Video: Linear regression: The final model