The book is an introductory text, presenting some of the basic concepts and techniques of Statistical inference. It has been written primarily to suit the students and research workers in the area of biological sciences.An understanding of the logic and theory of statistics is essential for the students of biology who are expected to know the techniques of analyzing data and drawing useful conclusions. It has been the intention of the authors to keep the book at a readability level appropriate for students who do not have a mathematical background.This book can serve as comprehensive reference source of statistical techniques helpful to biological research workers in the interpretation of data.