After using the quadratic model rather than the linear model, we found that the r^2 for the quadratic model is 0.876. What does this mean?
1 answer
An R^2 value of 0.876 for the quadratic model suggests that approximately 87.6% of the variations in the dependent variable can be explained by the quadratic model. In other words, the quadratic model fits the data quite well, accounting for a significant portion of the variability.