This book is intended to serve as a textbook for students of electrical engineering at the graduate level. The inclusion of a number of problems, many of which are completely solved, makes this book very useful in understanding topics in applied statistics and physics of dielectrics. Also, the contents are so designed as to provide a broad picture of dielectrics and electrical insulation. In view of this, the author believes that manufacturers of high voltage and high power equipments can be benefited to a considerable extent. The book could be of particular interest to research engineers/scientists working in research laboratories and conducting applied insulation research. Power supply utilities can consult this book for scheduling the diagnostic testing and condition monitoring schedules. Station engineers will be able to derive support in analyzing, for example, gas analysis and partial discharge data, if they are equipped with facilities to carry out such measurements.