Proof (part 4) minimizing squared error to regression line : Khan Academy on a Stick

Khan Academy on a Stick

Linear regression and correlation

Correlation and causality
Fitting a line to data
Estimating the line of best fit exercise
Squared error of regression line
Proof (part 1) minimizing squared error to regression line
Proof (part 2) minimizing squared error to regression line
Proof (part 3) minimizing squared error to regression line
Proof (part 4) minimizing squared error to regression line
Regression line example
Second regression example
R-squared or coefficient of determination
Calculating R-squared
Covariance and the regression line

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