In this book, Mahajan’s Methods in Biostatistics for Medical Students and Research Workers, an attempt has been made to highlight the basic principles of statistical methods or techniques for the use of medical students. The approach is to equip the students and researchers to the extent that they may be able to appreciate the utility and usefulness of statistics in medical and other biosciences, and apply the same in their respective areas of work. Certain essential methods in biostatistics must be learnt to understand their application in diagnosis, prognosis, prescription, and management of diseases in individuals and community and apply in research conducted during student life and beyond. The subject forms an integral part of all disciplines of medicine as explained already. The 10th edition of this book brings forth extensive revision and lucidly explained concepts, with addition of several new chapters and new subtopics, to make the book suitable for all levels of healthcare students, research workers, teachers, and public health professionals