A look at the relationship between the pooled-variance t test and simple linear regression. I illustrate how the pooled-variance t test can be done as a regression, by declaring an appropriate indicator variable.
The Cairo traffic police officer data is simulated data with the same summary statistics as found in:
Kamal, A., Eldamaty, S., and Faris, R. (1991). Blood level of Cairo traffic policemen. Science of the Total Environment, 105:165Ð170.
2 thoughts on “12.14 The Pooled-Variance t Test as a Regression”
I have just finished watching all your lectures for 12. Regression.
Thanks a lot for providing such resources. They helped me a tremendous amount and I admire the way you explained them:
– Right to the point
– Answering the most common questions
– Short and effective
– Perfectly pronounced
– Simple examples easy to follow
– Short but focused presentations
All these lectures helped me clarify some topics that were not clear to me: why the difference between the confidence and prediction interval, the usage of dummy variables, the leverage and influence.
Thanks a lot again for your contribution to this world. Your students must be very lucky with you.
Thanks so much Fernando. I’m very glad you’ve found my videos helpful. I agree with your assessment 🙂