Almost since its founding, FiveThirtyEight has published comprehensive averages of polls for a wide variety of questions related to U.S. politics. In June 2023, we debuted a new set of models for ...

Consider a response variable Y that can be predicted by a polynomial function of a regressor variable X. You can estimate , the intercept, , the slope due to X, and , the slope due to X 2, in for the ...

President Trump’s first real test on the ballot will come 20 months from now, when Republicans face voters at the midterm elections. But those Republicans have decisions to make today about whether to ...

This is a preview. Log in through your library . Abstract If an experimenter wants to determine the degree of a polynomial regression on the basis of a sample of observations, Anderson showed that the ...

Common data analysis and regression techniques for application in science, business and social science. Topics include simple and multiple regression; linear models with categorical explanatory ...