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Introduction to Linear Regression Analysis,9780470542811

Introduction to Linear Regression Analysis

by ; ;
Edition:
5th
ISBN13:

9780470542811

ISBN10:
0470542810
Format:
Hardcover
Pub. Date:
4/9/2012
Publisher(s):
Wiley
List Price: $146.13

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Summary

Clearly balancing theory with applications, this book describes both the conventional and less common uses of linear regression in the practical context of today's mathematical and scientific research. Beginning with a general introduction to regression modeling, including typical applications, the book then outlines a host of technical tools that form the linear regression analytical arsenal, including: basic inference procedures and introductory aspects of model adequacy checking; how transformations and weighted least squares can be used to resolve problems of model inadequacy; how to deal with influential observations; and polynomial regression models and their variations. The book also includes material on regression models with autocorrelated errors, bootstrapping regression estimates, classification and regression trees, and regression model validation.

Author Biography

DOUGLAS C. MONTGOMERY, PhD, is Regents Professor of Industrial Engineering and Statistics at Arizona State University. Dr. Montgomery is a Fellow of the American Statistical Association, the American Society for Quality, the Royal Statistical Society, and the Institute of Industrial Engineers and has more than thirty years of academic and consulting experience. He has devoted his research to engineering statistics, specifically the design and analysis of experiments, statistical methods for process monitoring and optimization, and the analysis of time-oriented data. Dr. Montgomery is the coauthor of Generalized Linear Models: With Applications in Engineering and the Sciences, Second Edition and Introduction to Time Series Analysis and Forecasting, both published by Wiley.

ELIZABETH A. PECK, PhD, is Logistics Modeling Specialist at the Coca-Cola Company in Atlanta, Georgia.

G. GEOFFREY VINING, PhD, is Professor in the Department of Statistics at Virginia Polytechnic and State University. He has published extensively in his areas of research interest, which include experimental design and analysis for quality improvement, response surface methodology, and statistical process control. A Fellow of the American Statistical Association and the American Society for Quality, Dr. Vining is the coauthor of Generalized Linear Models: With Applications in Engineering and the Sciences, Second Edition (Wiley).

Table of Contents

PREFACE xiii

1. INTRODUCTION 1

1.1 Regression and Model Building 1

1.2 Data Collection 5

1.3 Uses of Regression 9

1.4 Role of the Computer 10

2. SIMPLE LINEAR REGRESSION 12

2.1 Simple Linear Regression Model 12

2.2 Least-Squares Estimation of the Parameters 13

2.3 Hypothesis Testing on the Slope and Intercept 22

2.4 Interval Estimation in Simple Linear Regression 29

2.5 Prediction of New Observations 33

2.6 Coeffi cient of Determination 35

2.7 A Service Industry Application of Regression 37

2.8 Using SAS and R for Simple Linear Regression 39

2.9 Some Considerations in the Use of Regression 42

2.10 Regression Through the Origin 45

2.11 Estimation by Maximum Likelihood 51

2.12 Case Where the Regressor x is Random 52

3. MULTIPLE LINEAR REGRESSION 67

3.1 Multiple Regression Models 67

3.2 Estimation of the Model Parameters 70

3.3 Hypothesis Testing in Multiple Linear Regression 84

3.4 Confidence Intervals in Multiple Regression 97

3.5 Prediction of New Observations 104

3.6 A Multiple Regression Model for the Patient Satisfaction Data 104

3.7 Using SAS and R for Basic Multiple Linear Regression 106

3.8 Hidden Extrapolation in Multiple Regression 107

3.9 Standardized Regression Coeffi cients 111

3.10 Multicollinearity 117

3.11 Why Do Regression Coeffi cients Have the Wrong Sign? 119

4. MODEL ADEQUACY CHECKING 129

4.1 Introduction 129

4.2 Residual Analysis 130

4.3 PRESS Statistic 151

4.4 Detection and Treatment of Outliers 152

4.5 Lack of Fit of the Regression Model 156

5. TRANSFORMATIONS AND WEIGHTING TO CORRECT MODEL INADEQUACIES 171

5.1 Introduction 171

5.2 Variance-Stabilizing Transformations 172

5.3 Transformations to Linearize the Model 176

5.4 Analytical Methods for Selecting a Transformation 182

5.5 Generalized and Weighted Least Squares 188

5.6 Regression Models with Random Effect 194

6. DIAGNOSTICS FOR LEVERAGE AND INFLUENCE 211

6.1 Importance of Detecting Infl uential Observations 211

6.2 Leverage 212

6.3 Measures of Infl uence: Cook’s D 215

6.4 Measures of Infl uence: DFFITS and DFBETAS 217

6.5 A Measure of Model Performance 219

6.6 Detecting Groups of Infl uential Observations 220

6.7 Treatment of Infl uential Observations 220

7. POLYNOMIAL REGRESSION MODELS 223

7.1 Introduction 223

7.2 Polynomial Models in One Variable 223

7.3 Nonparametric Regression 236

7.4 Polynomial Models in Two or More Variables 242

7.5 Orthogonal Polynomials 248

8. INDICATOR VARIABLES 260

8.1 General Concept of Indicator Variables 260

8.2 Comments on the Use of Indicator Variables 273

8.3 Regression Approach to Analysis of Variance 275

9. MULTICOLLINEARITY 285

9.1 Introduction 285

9.2 Sources of Multicollinearity 286

9.3 Effects of Multicollinearity 288

9.4 Multicollinearity Diagnostics 292

9.5 Methods for Dealing with Multicollinearity 303

9.6 Using SAS to Perform Ridge and Principal-Component Regression 321

10. VARIABLE SELECTION AND MODEL BUILDING 327

10.1 Introduction 327

10.2 Computational Techniques for Variable Selection 338

10.3 Strategy for Variable Selection and Model Building 351

10.4 Case Study: Gorman and Toman Asphalt Data Using SAS 354

11. VALIDATION OF REGRESSION MODELS 372

11.1 Introduction 372

11.2 Validation Techniques 373

11.3 Data from Planned Experiments 385

12. INTRODUCTION TO NONLINEAR REGRESSION 389

12.1 Linear and Nonlinear Regression Models 389

12.2 Origins of Nonlinear Models 391

12.3 Nonlinear Least Squares 395

12.4 Transformation to a Linear Model 397

12.5 Parameter Estimation in a Nonlinear System 400

12.6 Statistical Inference in Nonlinear Regression 409

12.7 Examples of Nonlinear Regression Models 411

12.8 Using SAS and R 412

13. GENERALIZED LINEAR MODELS 421

13.1 Introduction 421

13.2 Logistic Regression Models 422

13.3 Poisson Regression 444

13.4 The Generalized Linear Model 450

14. REGRESSION ANALYSIS OF TIME SERIES DATA 474

14.1 Introduction to Regression Models for Time Series Data 474

14.2 Detecting Autocorrelation: The Durbin-Watson Test 475

14.3 Estimating the Parameters in Time Series Regression Models 480

15. OTHER TOPICS IN THE USE OF REGRESSION ANALYSIS 500

15.1 Robust Regression 500

15.2 Effect of Measurement Errors in the Regressors 511

15.3 Inverse Estimation—The Calibration Problem 513

15.4 Bootstrapping in Regression 517

15.5 Classifi cation and Regression Trees (CART) 524

15.6 Neural Networks 526

15.7 Designed Experiments for Regression 529

APPENDIX A. STATISTICAL TABLES 541

APPENDIX B. DATA SETS FOR EXERCISES 553

APPENDIX C. SUPPLEMENTAL TECHNICAL MATERIAL 574

C.1 Background on Basic Test Statistics 574

C.2 Background from the Theory of Linear Models 577

C.3 Important Results on SSR and SSRes 581

C.4 Gauss-Markov Theorem, Var(ε) = σ2I 587

C.5 Computational Aspects of Multiple Regression 589

C.6 Result on the Inverse of a Matrix 590

C.7 Development of the PRESS Statistic 591

C.8 Development of S2 (i) 593

C.9 Outlier Test Based on R-Student 594

C.10 Independence of Residuals and Fitted Values 596

C.11 Gauss–Markov Theorem, Var(ε) = V 597

C.12 Bias in MSRes When the Model Is Underspecifi ed 599

C.13 Computation of Infl uence Diagnostics 600

C.14 Generalized Linear Models 601

APPENDIX D. INTRODUCTION TO SAS 613

D.1 Basic Data Entry 614

D.2 Creating Permanent SAS Data Sets 618

D.3 Importing Data from an EXCEL File 619

D.4 Output Command 620

D.5 Log File 620

D.6 Adding Variables to an Existing SAS Data Set 622

APPENDIX E. INTRODUCTION TO R TO PERFORM LINEAR REGRESSION ANALYSIS 623

E.1 Basic Background on R 623

E.2 Basic Data Entry 624

E.3 Brief Comments on Other Functionality in R 626

E.4 R Commander 627

REFERENCES 628

INDEX 642



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