- Revised to match the new 2005 specification in light of comments from teachers, Cambridge Advanced Mathematics for OCR has been updated and improved to meet schools’ latest requirements.Based on the current OCR series, this new edition has been carefully revised by experienced teachers and examiners to produce accessible material for the new specification.Combining both modules in one volume for economy and easy reference, Statistics 3 & 4 is designed and written specifically for the OCR 2005 Statistics 3 and Statistics 4 A2 modules.Clear, easy-to-use text revised for the new 2005 specification, in line with teachers’ commentsExercises and questions written by examiners include revision exercises and mock exam papersSupports all students - includes practical and computer-based activities, as well as clearly marked extension material for exceptional students.