The Fourth Edition of Biostatistics o?ers updated and expanded content to meet the growing needs of students and researchers in life sciences. It is especially useful for graduate and postgraduate students studying subjects like Zoology, Botany, Microbiology, Agriculture, Environmental Biology, Public Health, Medicine, Nursing, and Paramedical sciences. The book is written in simple language and is easy to follow, even for those without a strong background in mathematics. Real-life examples from biology and health help make the concepts more relatable. Each topic includes clearly explained methods with step-by-step solutions to support better understanding. It introduces important modern topics such as survival analysis, meta-analysis, Bayesian statistics, longitudinal and multivariate analysis, statistical genomics, bioinformatics, and machine learning. The chapter also covers ethical issues and modern tools for data analysis and visualization. Almost every chapter has been updated with new solved examples and improved explanations. Helpful features like “Test Yourself ” questions, statistical formulas, symbols, appendices, and a glossary are also included. This revised edition will be a valuable resource for students, teachers, and researchers across various disciplines in health and biological sciences.