It is well known that the foundation and development of statistical theory came up with a search for interpretation of results of research experiments, hence decision making, in biological, agricultural and medical fields. This endeavour gave birth to a new stream of mathematical sciences named statistics. The present book aims to provide basic knowledge and explain application of biostatistics to master's level students pursuing courses in different disciplines and also to help young researchers. This book effectively summarizes the author's several years? experience of teaching and research. The author has also drawn ideas from her interaction with researchers in a variety of disciplines such as education, social science, life sciences, agricultural sciences, medical sciences, earth sciences and engineering. The book covers almost all parts of the recent UGC model syllabus in biological sciences relating to quantitative zoology. It explains how to choose an appropriate statistical analysis method for various biological experimental data. This book may be used as a textbook by undergraduate and postgraduate students of biostatistics in biological, agricultural and health sciences. It will help researchers in these and other aforesaid disciplines.