When we read the newspaper or watch TV news or read online news sites, we find ourselves inundated with data and its interpretation. Most often the data is presented in a summarized format, leading the reader to draw conclusions. Statistics allow us to summarize data in the familiar terms of counts, proportions, and averages. What is often missing, though, is information telling us how to interpret the statistic. The goal of this book is to learn about data: how to summarize it, how to present it, and how to infer from it when appropriate.