| (R, GDP) | Equation | |||
| a*x + b | a*exp(-((x-b)/c)^2) | a*exp (b*x) | a*x^b | |
| coefficients | a = 0.1143; b = 88.57 | a = 202.8; b = 1154; c = 1227 | a = 96.94; b = 0.0007 | a = 19.43; b = 0.3356 |
| SSE | 200 | 140.3056 | 367.9634 | 74.2242 |
| R-square | 0.9697 | 0.9787 | 0.9442 | 0.9888 |
| Adj-sq | 0.9545 | 0.9362 | 0.9164 | 0.9831 |
| RMSE | 10 | 11.8451 | 13.564 | 6.092 |