| Regression coefficients | ||||
Model term | Y1 | Y2 | Y3 | Y4 | Y5 |
Intercept | 22.2847 (1.1205) | 1.8608 (0.0589) | 65.2523 (0.3336) | 51.7167 (0.2112) | 607.1644 (2.1368) |
x1 | 12.1479 (0.5381) | 0.3580 (0.0283) | 5.5159 (0.1602) | 2.4656 (0.1014) | 29.6592 (1.0261) |
x2 | −2.1499 (0.5899) | −0.0285 (0.0310) | −0.8924 (0.1756) | 1.0097 (0.1112) | 16.4039 (1.1250) |
x3 | −8.5617 (0.5381) | 0.0292 (0.0283) | 0.5675 (0.1602) | 0.3829 (0.1014) | 5.1491 (1.0261) |
x1*x1 | 1.4958 (0.9189) | 0.2480 (0.0483) | 0.8754 (0.2736) | −0.0071 (0.1732) | 0.2271 (1.7524) |
x2*x1 | −2.1095 (0.7174) | 0.1582 (0.0377) | 0.6565 (0.2136) | −0.1479 (0.1352) | −2.7435 (1.3681) |
x2*x2 | 2.5217 (0.9774) | 0.0466 (0.0514) | −0.5885 (0.2910) | −0.1804 (0.1842) | −0.383 (1.8639) |
x3*x1 | −2.1788 (0.6498) | −0.0037 (0.0342) | −0.4981 (0.1935) | 0.0025 (0.1225) | −0.2087 (1.2391) |
x3*x2 | −1.9400 (0.7174) | −0.0059 (0.0377) | 0.0004 (0.2736) | −0.2629 (0.1352) | −2.7094 (1.3681) |
x3*x3 | 2.3083 (0.9189) | 0.0331 (0.0483) | −0.0102 (0.2136) | 0.0992 (0.1732) | 0.2721 (1.7524) |
Coefficient of determination (R2) | 0.9698 | 0.8987 | 0.9807 | 0.9643 | 0.9766 |