Statistics is a comprehensive science that infers the nature of the measured object and even predicts its future by searching, sorting, analyzing and describing the data. It uses a lot of professional knowledge in mathematics and other disciplines, and its application scope covers almost all fields of social science and natural science.

Statistics is a branch of mathematics that is used to collect, analyze, infer and present data. It is widely used in various disciplines, from natural science, social science to humanities, and even in industrial and commercial and government information decision-making. Given a set of data, statistics can summarize and describe these data. This usage is called descriptive statistics. In addition, the observer establishes a mathematical model in the form of data to explain its randomness and uncertainty, thus inferring the steps and matrices in the research. This usage is called inferential statistic. Both of these usages can be called applied statistics. In addition, there is a subject called mathematical statistics, which is devoted to discussing the theoretical basis behind this subject.