The coefficient of determination R² cannot be used to compare the linear and quadratic models, because A) the quadratic model has one parameter more to estimate. B) the quadratic model has two parameters more to estimate. C) the quadratic model always has a lower R². D) R² is not defined for the quadratic model.

Question

Quizplus · Accepted Answer

The quadratic model has one more parameter than the linear model, which can lead to a higher R² simply due to increased flexibility, not necessarily a better fit.

The Coefficient of Determination R2 Cannot Be Used to Compare

The Coefficient of Determination R² Cannot Be Used to Compare