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Answer to Question #779 in Statistics and Probability for Gwen

Question #779

How can we detect non-linearity of regression function?

Expert's answer

The simplest method is to check the distribution of residuals, versus independent variables and versus fitted values. If they are uniformly distributed, we can assume that we have linear relationships of dependent Y and independent X_i variables. You can also consider the scatterplot of Y versus each of the independent variables.

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