Chapter Residual Analysis Copyright © 2012 Pearson Education, Inc All rights reserved Section 8.1 Introduction Copyright © 2012 Pearson Education, Inc All rights reserved Section 8.2 Regression Residuals Copyright © 2012 Pearson Education, Inc All rights reserved Figure 8.1 Actual random error ε and regression residual ε^ Copyright © 2012 Pearson Education, Inc 8- Copyright © 2012 Pearson Education, Inc 8- Copyright © 2012 Pearson Education, Inc 8- Figure 8.2 SAS printout for firstorder model continued on next slide Copyright © 2012 Pearson Education, Inc 8- Figure 8.2 SAS printout for firstorder model (cont’d) Copyright © 2012 Pearson Education, Inc 8- Figure 8.3 SAS printout for quadratic (second-order) model continued on next slide Copyright © 2012 Pearson Education, Inc 8- Figure 8.3 SAS printout for quadratic (second-order) model (cont’d) Copyright © 2012 Pearson Education, Inc 8- 10 Figure 8.26 MINITAB regression printout for model of fast-food sales with corrected data point continued on next slide Copyright © 2012 Pearson Education, Inc 8- 43 Figure 8.26 MINITAB regression printout for model of fast-food sales with corrected data point (cont’d) Copyright © 2012 Pearson Education, Inc 8- 44 Figure 8.27 MINITAB plot of residuals versus traffic flow for model with corrected data point Copyright © 2012 Pearson Education, Inc 8- 45 Figure 8.28 MINITAB plot of residuals versus city for model with corrected data point Copyright © 2012 Pearson Education, Inc 8- 46 Copyright © 2012 Pearson Education, Inc 8- 47 Figure 8.29 SAS regression analysis with influence diagnosis for fast-food sales model continued on next slide Copyright © 2012 Pearson Education, Inc 8- 48 Figure 8.29 SAS regression analysis with influence diagnosis for fast-food sales model (cont’d) continued on next slide Copyright © 2012 Pearson Education, Inc 8- 49 Figure 8.29 SAS regression analysis with influence diagnosis for fast-food sales model (cont’d) Copyright © 2012 Pearson Education, Inc 8- 50 Section 8.7 Detecting Residual Correlation: The DurbinWatson test Copyright © 2012 Pearson Education, Inc All rights reserved Copyright © 2012 Pearson Education, Inc 8- 52 Figure 8.30 SAS regression printout for model of annual sales Copyright © 2012 Pearson Education, Inc 8- 53 Figure 8.31 SAS plot of residuals for model of annual sales Copyright © 2012 Pearson Education, Inc 8- 54 Copyright © 2012 Pearson Education, Inc 8- 55 Figure 8.32 Rejection region for the Durbin-Watson d-test: scale example Copyright © 2012 Pearson Education, Inc 8- 56 Copyright © 2012 Pearson Education, Inc 8- 57 ... 2012 Pearson Education, Inc 8- 25 Figure 8.14 MINITAB regression printout for second- order model of salary Copyright © 2012 Pearson Education, Inc 8- 26 Figure 8.15 MINITAB residual plot for second- order... model of salary Copyright © 2012 Pearson Education, Inc 8- 27 Figure 8.16 MINITAB regression printout for second- order model of natural log of salary Copyright © 2012 Pearson Education, Inc 8- 28... 8.17 MINITAB residual plot for second- order model of natural log of salary Copyright © 2012 Pearson Education, Inc 8- 29 Figure 8.18 MINITAB regression printout first-order model of natural log