This textbook presents the most important statistical methods encountered in engineering practice and explains how they work and can be applied - clearly, understandably, mathematically accurately, and practically. An introduction to probability theory sheds light on the background, important formulas and guidelines are clearly highlighted, and examples along with detailed solutions aid in understanding and learning, providing reliable answers to questions such as: "Does the production of components meet customer requirements? Do two manufacturing processes yield the same results? What is the probability that a machine component will fail after at least 2000 operating hours?" The book is suitable for use in technical and scientific degree programs as a supplement to lectures, for self-study, and as a handbook.