This book covers all the requirements of the O Level syllabus in Statistics of University of Cambridge International Examinations. It will also be of invaluable use of those studying Statistics and/or Probability on any other syllabus at a similar or higher level. The chapters in this book have been constructed and arranged in such a way that entire syllabus can be covered by working through chapters 1 to 12 in sequence. However, the teachers and students are at liberty to study the topics in an order of their choice.