This is the thoroughly revised and updated edition. The book is written by an author who has been teaching the subject for the last 40 years. Readers will find ample use of MS-Excel in this book and it will help in removing some of the complexities in statistical calculations. Chapters on ‘tests of significance’ have been arranged keeping in view the needs of the clinicians so that they are in a position to select appropriate test by referring to a single table. Inclusion of common nonparametric tests with their respective tables is a special feature of the book.