This course is a graduate-level introductory course on the theory and application of statistical methods in empirical research in political science. It primarily targets PhD students who wish to use statistical methods in their future research. The objective of the course is to provide these students with opportunities to acquire the foundational knowledge of statistics needed for further sophisticated statistical methods taught in more advanced courses and eventually self-taught in the future. Coverage includes: probability theory, descriptive statistics, descriptive, associational, and causal inference, and linear regression model.