Regression analysis studies how a response variable depends on explanatory variables through a regression model. It estimates that dependence and assesses uncertainty in fitted regression coefficients, predictions and model comparisons. Linear regression is one important case.
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Regression analysis is a statistical method used to examine the relationship between one or more independent variables (predictors) and a dependent variable (outcome). It helps in understanding how the dependent variable changes when any of the independent variables vary, and it allows for predicting the value of the dependent variable based on known values of the independent variables.