Linear Regression by Least Squares
We usually study more than one variable at a time. When the variables are continuous, and one is clearly a response variable and the others are predictor variables, we usually plot the variables and then attempt to fit a model to the plotted points. With one continuous predictor, the first model we attempt is a straight line; with two or more continuous predictors, we attempt a plane. We plot the model, the residuals from the model, and various diagnostics of the quality of the fit.
KeywordsSimple Linear Regression Prediction Interval Calculated Residual Residual Standard Error Residual Line
Unable to display preview. Download preview PDF.