UPDATED VERSION OF THIS VIDEO FOR 2023! Check it out here:
   • Learn Statistical Regression in 40 mi...  

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

See the whole regression series here:
   • Regression series (10 videos)  

Please note that in my videos I use the abbreviations:
SSR = Sum of Squares due to the Regression
SSE = Sum of Squares due to Error.

Intro: 0:00
Yhat line: 2:26
Sample error term, e: 3:47
SSR, SSE, SST: 8:40
Rsquared intro: 9:43
Population error term, ε: 12:11

Second video here:    • Regression II  Degrees of Freedom EX...  

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.