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Regression I: What is regression? | SSE, SSR, SST | R-squared | Errors (ε vs. e)

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Published on Nov 22, 2011

All videos here: http://www.zstatistics.com/videos/

The first video in a series of 5 explaining the fundamentals of regression.

Intro: 0:00
Y-hat line: 2:26
Sample error term, e: 3:47
SSR, SSE, SST: 8:40
R-squared intro: 9:43
Population error term, ε: 12:11

Second video here: http://www.youtube.com/watch?v=4otEcA...

Ever wondered WHY you have to SQUARE the error terms??

Here we deal with the very basics: what is regression? How do we establish a relationship between two variables? Why must we SQUARE the error terms? What exactly is SSE, SSR and SST? What is the difference between a POPULATION regression function and a SAMPLE regression line? Why are there so many different types of error terms??

Enjoy.

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