Regression analysis is a statistical method used to examine the relationship between one dependent variable and one or more independent variables. The goal of regression analysis is to understand the strength and direction of the relationship between variables, predict the value of the dependent variable based on the values of the independent variables, and identify which independent variables are most important in predicting the dependent variable. There are several types of regression analysis, including linear regression, logistic regression, polynomial regression, and more, each of which is used in different situations depending on the nature of the data and the research question being investigated. Regression analysis is commonly used in fields such as economics, social sciences, psychology, and business to analyze and interpret relationships between variables.