Statistics is a branch of mathematics that studies variability, as well as the random process that generates it, following laws of probability. This book provides over 2,000 Exam Prep questions and answers to accompany the text Idiots Guides Statistics Items include highly probable exam items: Relative standard deviation, Standard deviation, Strictly standardized mean difference, Lehmer mean, Range condition scoring, Geometric standard deviation, Power mean, Variogram, Quartile coefficient of dispersion, and more.