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Sample surveys play a vital role in modern society in allowing us to collect and process data about particular groups. Sample Survey: Principles and Methods aims to provide a digestible but comprehensive coverage of survey sampling to meet the needs of students, statisticians and other practitioners. This third edition has evolved to reflect the new demands for wider areas of application, and to keep up-to-date with developing methods of carrying out surveys, such as via email and the internet. New chapters introduce modern approaches to sampling methods for rare and sensitive events and for natural phenomena, with particular reference to contemporary biological, environmental and social issues. Wide-ranging topical examples on all topics are given throughout the text. Practical exercises are presented at chapter ends, and numerical answers are provided in all cases. As well as new chapters covering a wider range of fields in which sample surveys can be used, new features in this new edition include chapter summaries and an expanded bibliography and reference section.