This book was written for specialists in both social and natural sciences who require some knowledge of experimental design, statistical inference and decision theory; for managers who must understand basic business statistics and methods of quality control, as well as having some familiarity with the language of operations research, the theory of games and computer technology; for the engineer who needs to understand the methods of terminology of quality control, operatons research, reliability work, experimental design and computer technology; and for the research worker who must know enough of the language of statistics to understand technical reports in his field.