Linear Regression (Least Squares)

Least Squares

• Data as an Exact Table
• What Fit Means
• Residuals and the Error We Minimize
• The Normal Equations
• Building the Normal Equations
• Solving Exactly
• The Fitted Line and Zero-Sum Residuals
• Plug In One x
• Another Fit
• One Row Can Move the Fit
• Fitting Is Not Predicting