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Regression analysis is a method of analyzing the variability of a dependent variable based on information available on one or more independent variables. This method allows analysts to understand change in a dependent variable (Y) as a function of change in a number of independent variables (X1,X2,…,Xn). For example, the distribution of examinees’ math scores (dependent variable) can be explained as a function of examinees’ gender, ethnicity, and socio-economic status (independent variables). When only one independent variable is used, the analysis is refered to as simple regression. In a case involving more than one independent variable, the analysis is called multiple regression.
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