Khan Academy
Khan Academy: Proof (Pt 4) Minimizing Squared Error to Regression Line
Video about deriving the formula for the least squares regression line. This final video finishes up the derivation of the formula for line of best fit by solving the system of equations created by the partial derivatives. It finally...
Khan Academy
Khan Academy: Proof (Pt 2) Minimizing Squared Error to Regression Line
Video is the third of five related videos about deriving the formula for the least squares regression line. This video continues the algebraic manipulation to start deriving the formula by changing the notation to means instead of...
Khan Academy
Khan Academy: Statistics: Regression Line Example
Video demonstrates how to use the formulas to determine the best fitting regression line by doing an example of finding the regression line given 3 points. Includes graphing the regression line to show it visually. [9:27]
Khan Academy
Khan Academy: Proof (Part 1) Minimizing Squared Error to Regression Line
Video is the second of five related videos about deriving the formula for the least squares regression line. This video goes through the algebraic manipulation required at the begining of deriving the formula. [10:35]
Khan Academy
Khan Academy: Proof (Pt 3) Minimizing Squared Error to Regression Line
Video is the fourth of five related videos about deriving the formula for the least squares regression line. This video shows using partial derivatives and setting them equal to 0 to get closer to deriving the formula for m and b. It...
Khan Academy
Khan Academy: Statistics: Second Regression Example
Video demonstrates how to calculate the equation of the regression line from a set of 4 points. Leads up to determining the coefficient of determination or r-squared which is shown in the next video. [9:15]
Khan Academy
Khan Academy: Statistics: Calculating R Squared
Video shows using a spreadsheet to demonstrate calculating the coefficient of determination or r-squared. Also explains how to interpret the value of r-squared. [9:45]
Khan Academy
Khan Academy: Statistics: R Squared or Coefficient of Determination
Video reviews the basics of the regression line, then shows how the formula for the coefficient of determination or r squared is derived. Explains how to interpret the coefficient of determination. [12:41]
Khan Academy
Khan Academy: Statistics: Squared Error of Regression Line
Video is the first of five related videos about deriving the formula for the least squares regression line. This first video simply shows what the least squares regression line is and gives a basic illustration and generalized formula...