The second edition of the authoritative guide to the theory and application of statistics. An approachable guide to the study of statistics will always be in demand, as knowledge of the subject's teaching and application is increasingly needed in the modern world. Encyclopedic in treatment after each initial definition, the book's entries have been selected primarily to cater for the needs of students studying mathematics at A-level or similar exams, and those studying statistics as part of courses in other disciplines, such as economics, biology and sociology. The second edition of the Collins Dictionary of Statistics has been fully updated and revised to take into account the ways statistical techniques are used in our media-dominated world. The author, Roger Porkess, has become very well known in education and media circles as a result of his challenges to the UK government over the continuing controversy concerning the A-level marking fiasco of 2002.