When = 1 = ______________________________ x ypred = ______________________________ When = 2 = ______________________________ x ypred = ______________________________ ypred Or use the CAS calculator to get the values from the regression line by opening a Graphs & ypred Geometry page and enter the equation of the least-squares regression and press enter. Once you have the graph press b, Menu 5: Trace 5 1: Graph Trace 1. Type in the value and the corresponding value will appear. x y Calculate the residuals using, Residual = Step 4. y ypred When = 1 Residual = ______________________________ x Residual = ______________________________ When = 2 Residual = ______________________________ x Residual = ______________________________ Calculate the rest of the residuals and enter them into the table. Add all residuals to check it equals zero. Step 5. Plot residual values against original x-values. The residual plot shows
When x = 1 ypred = ______________________________ = ______________________________ When x = 2 ypred = ______________________________ ypred = ______________________________ Or use the CAS calculator to get the ypred values from the regression line by opening a Graphs & Geometry page and enter the equation of the least-squares regression and press enter. Once you have the graph press Menu b, 5: Trace 5 1: Graph Trace 1. Type in the x value and the corresponding y value will appear. Step 4. Calculate the residuals using, Residual = y ypred When x = 1 Residual = ______________________________ Residual = ______________________________ When x = 2 Residual = ______________________________ Residual = ______________________________ Calculate the rest of the residuals and enter them into the table. Add all residuals to check it equals zero. Step 5. Plot residual values against original x-values. The residual plot shows