Robust Statistical Methods with R

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  • e-Book: 216 pages
  • Also available in Hardback
  • Published: November 2005
  • ISBN: 978-1-4200351-3-1
  • Publisher: Chapman and Hall/CRC

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Robust statistical methods were developed to supplement the classical procedures when the data violate classical assumptions. They are ideally suited to applied research across a broad spectrum of study, yet most books on the subject are narrowly focused, overly theoretical, or simply outdated. Robust Statistical Methods with R provides a systematic treatment of robust procedures with an emphasis on practical application.

The authors work from underlying mathematical tools to implementation, paying special attention to the computational aspects. They cover the whole range of robust methods, including differentiable statistical functions, distance of measures, influence functions, and asymptotic distributions, in a rigorous yet approachable manner. Highlighting hands-on problem solving, many examples and computational algorithms using the R software supplement the discussion. The book examines the characteristics of robustness, estimators of real parameter, large sample properties, and goodness-of-fit tests. It also includes a brief overview of R in an appendix for those with little experience using the software.

Based on more than a decade of teaching and research experience, Robust Statistical Methods with R offers a thorough, detailed overview of robust procedures. It is an ideal introduction for those new to the field and a convenient reference for those who apply robust methods in their daily work.

Table of Contents

INTRODUCTION

MATHEMATICAL TOOLS OF ROBUSTNESS

Statistical Model

Illustration on Statistical Estimation

Statistical Functional

Fisher's Consistency

Some Distances of Probability Measures

Relations between Distances

Differentiable Statistical Functionals

Gâteau Derivative

Fréchet Derivative

Hadamard (Compact) Derivative

Large Sample Distribution of Empirical Functional

Computation and Software Notes

Problems and Complements

BASIC CHARACTERISTICS OF ROBUSTNESS

Influence Function

Discretized Form of Influence Function

Qualitative Robustness

Quantitative Characteristics of Robustness Based on Influence Function

Maximum Bias

Breakdown Point

Tail-Behavior Measure of a Statistical Estimator

Variance of Asymptotic Normal Distribution

Problems and Complements

ROBUST ESTIMATORS OF REAL PARAMETER

Introduction

M-Estimators

M-Estimator of Location Parameter

Finite Sample Minimax Property of M-Estimator

Moment Convergence of M-Estimators

Studentized M-Estimators

L-Estimators

Sequential M- and L-Estimators

R-Estimators

Numerical Illustration

Computation and Software Notes

Problems and Complements

ROBUST ESTIMATORS IN LINEAR MODEL

Introduction

Least Squares Method

M-Estimators

GM-Estimators

S-Estimators and MM-Estimators

L-Estimators, Regression Quantiles

Regression Rank Scores

Robust Scale Statistics

Estimators with High Breakdown Points

One-Step Versions of Estimators

Numerical Illustrations

Computation and Software Notes

Problems and Complements

MULTIVARIATE LOCATION MODEL

Introduction

Multivariate M-Estimators of Location and Scatter

High Breakdown Estimators of Multivariate Location and Scatter

Admissibility and Shrinkage

Numerical Illustrations and Software Notes

Problem and Complements

SOME LARGE SAMPLE PROPERTIES OF ROBUST PROCEDURES

Introduction

M-Estimators

L-Estimators

R-Estimators

Interrelationships of M-, L-, and R-Estimators

Minimaximally Robust Estimators

Problems and Complements

SOME GOODNESS-OF-FIT TESTS

Introduction

Tests of Normality of the Shapiro-Wilk Type with Nuisance Regression and Scale Parameters

Goodness-of-Fit Tests for General Distribution with Nuisance Regression and Scale

Numerical Illustration

Computation and Software Notes

APPENDIX A: R SYSTEM

Brief R Overview

REFERENCES

SUBJECT INDEX

AUTHOR INDEX