Chapter 9 Special Topics in Regression Optional Copyright
- Slides: 52
Chapter 9 Special Topics in Regression (Optional) Copyright © 2012 Pearson Education, Inc. All rights reserved.
Section 9. 1 Introduction Copyright © 2012 Pearson Education, Inc. All rights reserved.
Section 9. 2 Piecewise Linear Regression Copyright © 2012 Pearson Education, Inc. All rights reserved.
Figure 9. 1 Relationship between compressive strength (y) and water/cement ratio (x) Copyright © 2012 Pearson Education, Inc. All rights reserved. 4
Figure 9. 2 Slopes and y-intercepts for piecewise linear regression Copyright © 2012 Pearson Education, Inc. All rights reserved. 5
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Figure 9. 3 SAS piecewise linear regression printout Copyright © 2012 Pearson Education, Inc. All rights reserved. 7
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Figure 9. 4 MINITAB graph of reading scores Copyright © 2012 Pearson Education, Inc. All rights reserved. 11
Figure 9. 5 MINITAB analysis of straight-line model for reading score Copyright © 2012 Pearson Education, Inc. All rights reserved. 12
Figure 9. 6 MINITAB graph of reading scores, with quadratic model results Copyright © 2012 Pearson Education, Inc. All rights reserved. 13
Figure 9. 7 SAS analysis of piecewise linear model for reading score Copyright © 2012 Pearson Education, Inc. All rights reserved. 14
Figure 9. 8 MINITAB graph of predicting reading scores using piecewise regression Copyright © 2012 Pearson Education, Inc. All rights reserved. 15
Section 9. 3 Inverse Prediction Copyright © 2012 Pearson Education, Inc. All rights reserved.
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Figure 9. 9 MINITAB analysis of straight-line model, Example 9. 3 Copyright © 2012 Pearson Education, Inc. All rights reserved. 19
Figure 9. 10 MINITAB scatterplot of data and least squares line, Example 9. 3 Copyright © 2012 Pearson Education, Inc. All rights reserved. 20
Section 9. 4 Weighted Least Squares Copyright © 2012 Pearson Education, Inc. All rights reserved.
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Figure 9. 11 MINITAB printout of straight-line model, Example 9. 4 Copyright © 2012 Pearson Education, Inc. All rights reserved. 23
Figure 9. 12 MINITAB plot of residuals against road length, x Copyright © 2012 Pearson Education, Inc. All rights reserved. 24
Copyright © 2012 Pearson Education, Inc. All rights reserved. 25
Figure 9. 13 MINITAB printout of weighted least squares fit, Example 9. 4 Copyright © 2012 Pearson Education, Inc. All rights reserved. 26
Figure 9. 14 MINITAB plot of weight residuals against road length, x Copyright © 2012 Pearson Education, Inc. All rights reserved. 27
Section 9. 5 Modeling Qualitative Dependent Variables Copyright © 2012 Pearson Education, Inc. All rights reserved.
Section 9. 6 Logistic Regression Copyright © 2012 Pearson Education, Inc. All rights reserved.
Figure 9. 15 Graph of E(y) for the logistic model Copyright © 2012 Pearson Education, Inc. All rights reserved. 30
Copyright © 2012 Pearson Education, Inc. All rights reserved. 31
Figure 9. 16 Several chi-square probability distributions Copyright © 2012 Pearson Education, Inc. All rights reserved. 32
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Figure 9. 17 SAS printout of logistic regression on bid status Copyright © 2012 Pearson Education, Inc. All rights reserved. continued on next slide 34
Figure 9. 17 SAS printout of logistic regression on bid status (cont’d) Copyright © 2012 Pearson Education, Inc. All rights reserved. continued on next slide 35
Figure 9. 17 SAS printout of logistic regression on bid status (cont’d) Copyright © 2012 Pearson Education, Inc. All rights reserved. 36
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Figure 9. 18 SAS analysis of complete second-order logistic model, Example 9. 6 Copyright © 2012 Pearson Education, Inc. All rights reserved. 38
Section 9. 7 Ridge Regression Copyright © 2012 Pearson Education, Inc. All rights reserved.
Figure 9. 19 Sampling distributions of two estimators of a regression coefficient b Copyright © 2012 Pearson Education, Inc. All rights reserved. 40
Figure 9. 20 Ridge trace of b coefficients of a model with three independent variables Copyright © 2012 Pearson Education, Inc. All rights reserved. 41
Figure 9. 21 SAS regression printout for model of carbon monoxide content, Example 9. 7 Copyright © 2012 Pearson Education, Inc. All rights reserved. 42
Figure 9. 22 SAS ridge trace for model of carbon monoxide content Copyright © 2012 Pearson Education, Inc. All rights reserved. 43
Figure 9. 23 a SAS listing of VIFs for ridge regression of carbon monoxide content Copyright © 2012 Pearson Education, Inc. All rights reserved. 44
Figure 9. 23 b SAS listing of ridge beta estimates and root MSE for carbon monoxide content model Copyright © 2012 Pearson Education, Inc. All rights reserved. 45
Section 9. 8 Robust Regression Copyright © 2012 Pearson Education, Inc. All rights reserved.
Figure 9. 24 Probability distribution of e : normal versus heavy-tailed Copyright © 2012 Pearson Education, Inc. All rights reserved. 47
Figure 9. 25 SAS least squares regression printout for fast-food sales model Copyright © 2012 Pearson Education, Inc. All rights reserved. 48
Section 9. 9 Nonparametric Regression Models Copyright © 2012 Pearson Education, Inc. All rights reserved.
Figure 9. 26 SAS robust regression printout for fast-food sales model Copyright © 2012 Pearson Education, Inc. All rights reserved. continued on next slide 50
Figure 9. 26 SAS robust regression printout for fast-food sales model (cont’d) Copyright © 2012 Pearson Education, Inc. All rights reserved. 51
Figure 9. 27 Scatterplot of data for MS patients Copyright © 2012 Pearson Education, Inc. All rights reserved. 52
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