Key Takeaways Quadratic regression extends linear regression by adding squared terms and pairwise interaction terms, enabling the model to capture non-linear structure and predictor interactions. The ...

We consider a quadratic regression model and derive D-optimal exact designs for estimating any given subset of the model parameters. Our results complete recent findings of Krafft and Schaefer (1995) ...

sciences. As a result of this widespread interest in identifying non-monotonic relationships in data and the well-known problems with standard parametric approaches based on quadratic regression ...