Regression analysis is a statistical process for estimating the relationship between two or more variables. The relationship is modeled as \(y \sim x\) or \(y = f(x)\). Both model descriptions indicate, that the variable \(y\) is a function of \(x\). Therefore, the variable \(y\) is denoted as the response variable or dependent variable, whereas the variable \(x\) is denoted as the predictor variable or independent variable.

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