Nonparametric Tests for Censored Data
by Bagdonavicius, Vilijandas; Kruopis, Julius; Nikulin, Mikhail S.Edition: 1st
Format: Hardcover
Pub. Date: 2011-01-18
Publisher(s): Wiley-ISTE
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Summary
This book concerns testing hypotheses in non-parametric models. Generalizations of many non-parametric tests to the case of censored and truncated data are considered. Most of the test results are proved and real applications are illustrated using examples. Theories and exercises are provided. The incorrect use of many tests applying most statistical software is highlighted and discussed.
Author Biography
Vilijandas Bagdonavicius is Professor of Mathematics at the University of Vilnius in Lithuania. His main research areas are statistics, reliability and survival analysis. Julius Kruopis is Associate Professor of Mathematics at the University of Vilnius in Lithuania. His main research areas are statistics and quality control.
Table of Contents
| Preface | p. xi |
| Terms and Notation | p. xv |
| Censored and Truncated Data | p. 1 |
| Right-censored data | p. 2 |
| Left truncation | p. 12 |
| Left truncation and right censoring | p. 14 |
| Nelson-Aalen and Kaplan-Meier estimators | p. 15 |
| Bibliographic notes | p. 17 |
| Chi-squared Tests | p. 19 |
| Chi-squared test for composite hypothesis | p. 19 |
| Chi-squared test for exponential distributions | p. 31 |
| Chi-squared tests for shape-scale distribution families | p. 36 |
| Chi-squared test for the Weibull distribution | p. 39 |
| Chi-squared tests for the loglogistic distribution | p. 44 |
| Chi-squared test for the lognormal distribution | p. 46 |
| Chi-squared tests for other families | p. 51 |
| Chi-squared test for the Gompertz distribution | p. 53 |
| Chi-squared test for distribution with hyperbolic hazard function | p. 56 |
| Bibliographic notes | p. 59 |
| Exercises | p. 59 |
| Answers | p. 60 |
| Homogeneity Tests for Independent Populations | p. 63 |
| Data | p. 64 |
| Weighted logrank statistics | p. 64 |
| Logrank test statistics as weighted sums of differences between observed and expected number of failures | p. 66 |
| Examples of weights | p. 67 |
| Weighted logrank statistics as modified score statistics | p. 69 |
| The first two moments of weighted logrank statistics | p. 71 |
| Asymptotic properties of weighted logrank statistics | p. 73 |
| Weighted logrank tests | p. 80 |
| Homogeneity testing when alternatives are crossings of survival functions | p. 85 |
| Alternatives | p. 86 |
| Modified score statistics | p. 88 |
| Limit distribution of the modified score statistics | p. 91 |
| Homogeneity tests against crossing survival functions alternatives | p. 92 |
| Bibliographic notes | p. 97 |
| Exercises | p. 98 |
| Answers | p. 102 |
| Homogeneity Tests for Related Populations | p. 105 |
| Paired samples | p. 106 |
| Data | p. 106 |
| Test statistics | p. 107 |
| Asymptotic distribution of the test statistic | p. 107 |
| The test | p. 116 |
| Logrank-type tests for homogeneity of related k > 2 samples | p. 119 |
| Homogeneity tests for related samples against crossing marginal survival functions alternatives | p. 122 |
| Bibliographic notes | p. 124 |
| Exercises | p. 125 |
| Answers | p. 126 |
| Goodness-of-fit for Regression Models | p. 127 |
| Goodness-of-fit for the semi-parametric Cox model | p. 127 |
| The Cox model | p. 127 |
| Alternatives to the Cox model based on expanded models | p. 128 |
| The data and the modified score statistics | p. 129 |
| Asymptotic distribution of the modified score statistic | p. 133 |
| Tests | p. 137 |
| Chi-squared goodness-of-fit tests for parametric AFT models | p. 142 |
| Accelerated failure time model | p. 142 |
| Parametric AFT model | p. 144 |
| Data | p. 144 |
| Idea of test construction | p. 145 |
| Asymptotic distribution of Hn and Z | p. 146 |
| Test statistics | p. 151 |
| Chi-squared test for the exponential AFT model | p. 153 |
| Chi-squared tests for scale-shape APT models | p. 159 |
| Chi-squared test for the Weibull AFT model | p. 163 |
| Chi-squared test for the lognormal AFT model | p. 166 |
| Chi-squared test for the loglogistic AFT model | p. 169 |
| Bibliographic notes | p. 172 |
| Exercises | p. 173 |
| Answers | p. 174 |
| Appendices | p. 177 |
| Maximum Likelihood Method for Censored Samples | p. 179 |
| ML estimators: right censoring | p. 179 |
| ML estimators: left truncation | p. 181 |
| ML estimators: left truncation and right censoring | p. 182 |
| Consistency and asymptotic normality of the ML estimators | p. 186 |
| Parametric ML estimation for survival regression models | p. 187 |
| Notions from the Theory of Stochastic Processes | p. 191 |
| Stochastic process | p. 191 |
| Counting process | p. 193 |
| Martingale and local martingale | p. 194 |
| Stochastic integral | p. 195 |
| Predictable process and Doob-Meyer decomposition | p. 197 |
| Predictable variation and predictable covariation | p. 198 |
| Stochastic integrals with respect to martingales | p. 204 |
| Central limit theorem for martingales | p. 207 |
| Semi-parametric Estimation using the Cox Model | p. 211 |
| Partial likelihood | p. 211 |
| Asymptotic properties of estimators | p. 213 |
| Bibliography | p. 225 |
| Index | p. 231 |
| Table of Contents provided by Ingram. All Rights Reserved. |
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