Table 5.

The t- and p- values of full model with X1, X2, X3, X4, X5 as independent variables

Parameter	t-value	p-value
Intercept	13.75	<0.001
X1	−2.79	0.0092
X2	1.53	0.1376
X3	3.07	0.0046
X4	1.2	0.2404
X5	−0.81	0.425
X1 × X1	0.66	0.5167
X2 × X1	−2.1	0.1446
X2 × X2	−2.67	0.0124
X3 × X1	−0.27	0.7855
X3 × X2	−0.1	0.9206
X3 × X3	−2.86	0.0078
X4 × X1	0.31	0.758
X4 × X2	0.22	0.8304
X4 × X3	−0.74	0.4662
X4 × X4	−2.21	0.0352
X5 × X1	−0.8	0.4292
X5 × X2	1.3	0.2026
X5 × X3	0.25	0.8061
X5 × X4	0.2	0.8427
X5 × X5	−0.58	0.5675
Linear		0.0046
Quadratic		0.0055
Cross Product		0.6621

R² = 0.6339 for the total model