The document discusses regression analysis, which examines the relationships between independent and dependent variables. It defines key terms like independent variable, dependent variable, and examines types of regression including linear, multiple, and logistic regression. Linear regression analyzes the influence of one independent variable on one dependent variable, while multiple regression examines more than one independent variable. The document reviews assumptions, equations, and applications of regression analysis, and provides an example of using it to understand the influence of study skills on exam performance.