Regression coefficient Value Standard error P-Value
β1 95.359 0.475  

Linear

β1 2.024 0.316 0.000
β2 0.186 0.316 0.028
β3 -1.219 0.316 0.003

Quadratic

β11 -0.610 0.308 0.075
β22 -2.295 0.308 0.000
β33 -1.334 0.308 0.001

Interaction

β12 -0.396 0.412 0.039
β13 -0.228 0.412 0.020
β23 -0.210 0.412 0.212
Rsq 0.927    
Rsq(adj) 0.862    
Table 4: Regression coefficients of the fitted quadratic equation and standard errors.