Biostatistics is the application of statistics to a wide range of topics in biology. The science of biostatistics encompasses the design of biological experiments, the collection, summarization, and analysis of data from the experiments and the interpretation and inference of the results. This book generally focuses on the chapters of scope of statistical methods, collection of data, diagrammatic and graphical representation of data, measures of central tendency, dispersion, and test of significance, correlation, regression and probabilities. Every chapter in this book explains the principles through the appropriate illustrations. The book has been written keeping in mind the syllabus prescribed by The Tamil Nadu Dr. M.G.R. Medical University. This book is useful for the students of D. Pharm., B. Pharm., Pharm. D., students. Even though this book is written for the Pharmacy students, it will be equally useful for the students of medicine and social sciences. It is a handbook to be read, kept and referred to again and again.