Linear Models

Brenton R. Clarke, PhD, is Senior Lecturer in Mathematics and Statistics at Murdoch University, Australia. A former president of the Western Australian Branch of the Statistical Society of Australia, Dr. Clarke has published numerous journal articles in his areas of research interest, which include linear models, robust statistics, and time series analysis.

• Preface. Acknowledgments.Notation.1. Introduction.1.1 The Linear Model and Examples.1.2 What Are the Objectives?.1.3 Problems.2. Projection Matrices and Vector Space Theory.2.1 Basis of a Vector Space.2.2 Range and Kernel.2.3 Projections.2.3.1 Linear Model Application.2.4 Sums and Differences of Orthogonal Projections.2.5 Problems.3. Least Squares Theory.3.1 The Normal Equations.3.2 The Gauss-Markov Theorem.3.3 The Distribution of SΩ.3.4 Some Simple Significance Tests.3.5 Prediction Intervals.3.6 Problems.4. Distribution Theory.4.1 Motivation.4.2 Non-Central X2 and F Distributions.4.2.1 Non-Central F-Distribution.4.2.2 Applications to Linear Models.4.2.3 Some Simple Extensions.4.3 Problems.5. Helmert Matrices and Orthogonal Relationships.5.1 Transformations to Independent Normally Distributed Random Variables.5.2 The Kronecker Product.5.3 Orthogonal Components in Two-Way ANOVA: One Observation Per Cell.5.4 Orthogonal Components in Two-Way ANOVA with Replications.5.5 The Gauss-Markov Theorem Revisited.5.6 Orthogonal Components for Interaction.5.6.1 Testing for Interaction: One Observation Per Cell.5.6.2 Example Calculation of Tukey’s One's Degree of Freedom Statistic.5.7 Problems.6. Further Discussion of ANOVA.6.1 The Different Representations of Orthogonal Components.6.2 On the Lack of Orthogonality.6.3 The Relationship Algebra.6.4 The Triple Classification.6.5 Latin Squares.6.6 2k Factorial Designs.6.6.1 Yates’ Algorithm.6.7 The Function of Randomization.6.8 Brief View of Multiple Comparison Techniques.6.9 Problems.7. Residual Analysis: Diagnostics and Robustness.7.1 Design Diagnostics.7.1.1 Standardized and Studentized Residuals.7.1.2 Combining Design and Residual Effects on Fit - DFITS.7.1.3 The Cook-D-Statistic.7.2 Robust Approaches.7.2.1 Adaptive Trimmed Likelihood Algorithm.7.3 Problems.8. Models That Include Variance Components.8.1 The One-Way Random Effects Model.8.2 The Mixed Two-Way Model.8.3 A Split Plot Design.8.3.1 A Traditional Model.8.4 Problems.9. Likelihood Approaches.9.1 Maximum Likelihood Estimation.9.2 REML.9.3 Discussion of Hierarchical Statistical Models.9.3.1 Hierarchy for the Mixed Model (Assuming Normality).9.4 Problems.10. Uncorrelated Residuals Formed from the Linear Model.10.1 Best Linear Unbiased Error Estimates.10.2 The Best Linear Unbiased Scalar-Covariance-Matrix Approach.10.3 Explicit Solution.10.4 Recursive Residuals.10.4.1 Recursive Residuals and their Properties.10.5 Uncorrelated Residuals.10.5.1 The Main Results.10.5.2 Final Remarks.10.6 Problems.11. Further inferential questions relating to ANOVA.References.Index.

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