6 Principles of Data Reduction

6.1 Introduction

6.2 The Sufficiency Principle

6.2.1 Sufficient Statistics

6.2.2 Minimal Sufficient Statistics

6.2.3 Ancillary Statistics

6.2.4 Sufficient, Ancillary, and Complete Statistics

6.3 The Likelihood Principle

6.3.1 The Likelihood Function

6.3.2 The Formal Likelihood Principe

6.4 The Equivariance Principle

6.5 Miscelllanea