For criminology and criminal justice undergraduate statistics courses. This book is concept-based and focuses on the building blocks of statistical ideas. Covering the essential techniques-univariate tools, Chi-square, t-test, analysis of variance, and Pearson's r-in a simple conversational style, the text explains the concepts behind each technique and how results are interpreted. Its emphasis is on understanding over mathematical calculations, and its goal is to give students a grasp of the role of variance and error. A chapter on graphical statistics complements the normal quantitative approaches and each technique is set in the context of how it is used to answer research questions.