(2010) found that the determination coefficients
for all morphological traits relative to live body weight traits of Ruditapes philippinarum were greater than 0.85, indicating that the morphological traits measured were the main factors affecting live body weight.
Table 5 and table 6 present the equations together with the determination coefficient
and standard error of estimate obtained for the Modulus of Elasticity obtained in the direction parallel and perpendicular to plane of panels to each species.
The RMSEC and RMSECV were 0.06 and 0.08; the determination coefficient
Pearson's correlation coefficient (r) and the determination coefficient
([R.sup.2]) were used in order to achieve the relation between productivity and use of pesticides per area.
The semivariograms adjusted to the models are shown in Figure 2, which presented adjustments to the spherical model, presenting determination coefficient
([R.sup.2]) ranging from 0.57 to 0.99, which justifies the aggregate distribution of the variables in the studied area.
Anthropometric Equations Model # [R.sup.2] Variables BM; Height; RAC LBM = -64.902 + (0.283 x BM) 1 0.89 + (0.487 x H) + (0.477 x RAC) BM; Height; CAC LBM = -59.459 + (0.306 x BM) 2 0.89 + (0.445 x H) + (0.465 x CAC) BM; Height; AMA LBM = -49.459 + (0.350 x BM) 3 0.91 + (0.411 x H) + (0.171 x AMA) BMI; AMA LBM = 13.120 + (0.963 x BMI) 4 0.52 + (0.313 x AMA) Anthropometric SEE ICC Variables BM; Height; RAC 2.26 0.94 BM; Height; CAC 2.26 0.94 BM; Height; AMA 2.0 0.95 BMI; AMA 4.7 0.68 BM = Body Mass; AMA = Arm Muscular Area; H = Height; RAC = Relaxed Arm Circumference; CAC = Contracted Arm Circumference; LBM = Lean Body Mass; BMI = Body Mass Index; [R.sup.2] = Determination Coefficient
; SEE = Standard Error of Estimate; ICC = Intraclass Correlation Coefficient
The results of the regression can be interpreted so that the determination coefficient
for this model is [R.sup.2] = 0.1169, which means very low dependence.
According to the regression model of this study that the determination coefficient
([r.sup.2]) is 0.78.
Then, multiple linear regression analyses were performed, selecting statistical models based on the F-test for the regression (p < 0.05), F-test for lack of adjustment (p > 0.05), t-test for regression coefficients (p < 0.05) and the adjusted determination coefficient
We made the comparison and the validation of these two models by calculating the determination coefficient
(criterion 1), the comparison of residuals (criterion 2), application of AIC criterion (criterion 3) and use of F-test (criterion 4).
When the radius is less than 3500 m, the coefficient of determination for the 30[degrees] opening angle is generally larger than the other two angles, and when the radius is larger than 3500 m, the determination coefficient
of the 60[degrees] opening angle is generally larger than the other two angles.
For each regression analysis, the following values were recorded: intercept n, slope m, determination coefficient
[R.sup.2], and p values.