Used by hundreds of thousands of students since its first edition, INTRODUCTION TO PROBABILITY AND STATISTICS, 15th Edition, Metric Edition continues to blend the best of its proven, error-free coverage with new innovations. Written for the traditional Introductory Statistics course, the book takes advantage of modern technology--including computational software and graphing calculators--to facilitate statistical reasoning as well as the interpretation of statistical results. In addition to showing how to apply statistical procedures, the authors explain how to describe real sets of data meaningfully, what the statistical tests mean in terms of their practical applications, how to evaluate the validity of the assumptions behind statistical tests, and what to do when statistical assumptions have been violated. The new edition strives to simplify the language of the exposition, examples and exercises, while retaining the statistical integrity that has made this text a market leader--and builds upon this tradition of excellence with new technology integration.