Probability and Statistics This book is composed of essential essential concepts and main properties of probability and statistics, and various application examples. In particular, we summarized the important contents for the first and second tests of the "Probability and Statistics" curriculum of the preliminary mathematics teachers preparing for the revised secondary teacher placement test. In addition to the basic subject matter definitions and theorems of each unit and the complex and deepened examples that require the overall understanding of the unit, we have constructed the second major subject contents of the five-point multiple choice multiple choice and the narrative type.