This book is not to acquire knowledge about C or Statistics. It will be considered that whoever will read this book, must have some knowledge about C & Statistics. It will only serve the purpose of analyzing statistical data using C. It will provide a comprehensive and technically correct treatment of almost all important aspects of statistical data analysis with C. This book as an introductory & advance course in statistical data analysis with C is intended mainly for users such as UG & PG students of Mathematical & Computer Science, Statisticians and Engineers who need to use statistical methods in their work. In preparing this book, I have borne in mind not only the syllabi of the courses in Mathematical & Computer Science of different universities but also the requirements of the research worker, for whom the whole book is expected to serve as a reliable guide.