The HarperCollins Dictionary of Statistics is a valuable reference tool for students and professionals alike. The 450 in-depth entries include over 100 graphs and diagrams and worked-out examples to aid the reader. The dictionary covers a comprehensive range of concepts and terms, including how statistical measures are calculated and their tests applied. Also included is a useful series of appendices which provide full lists of symbols and formulas used in the dictionary, along with the statistical tables required for the tests and techniques described throughout the book. - Back cover.