Table 1.

Determination of the degree of polynomial regression of Fig. 2A

Degreer2 adjustedResidual sum of squaresd.f.FP(F)t for the highest termP(t)
10.39422401410.750.0055-3.280.005
20.3492232135.030.02400.200.843
30.6341159129.670.00163.340.006
40.6021155116.680.0056-0.190.853
50.708770108.280.0025-2.230.050
  • Total sum of squares 3959, d.f. 15.

    The table includes the following: the degree of polynomial regression (Degree); the adjusted coefficient of determination (r2); the sum of squares about the regression (Residual sum of squares) and degrees of freedom (d.f.); the variance ratio (F) and the probability value, P(F), testing the significance of the decrease in residual mean square; Student's t-test (t for the highest term) and its P(t) value for the introduction of the last term in the regression equation.