A comprehensive, student-focused textbook designed primarily for undergraduate business students taking an introductory course on quantitative methods. Starting with no assumptions about students' knowledge, the authors use numerous examples, checkpoints and assessments to encourage "learning by doing" and provide support for students of all abilities. This edition includes a new chapter on decision-making, incorporates the use of SPSS in addition to Excel, and offers an expanded set of companion web resources for students and lecturers.