Table 5.

Estimated parameters for the quadratic model predicting the efficiency of hydrolysis of starch from cassava

Terms	Coefficient	Standard error	t(13)	P-value
Mean	80.65	3.01	26.75	<0.0001
X 1 (1L)	5.85	1.23	4.76	0.0004
X 1 (Q)	−1.85	1.23	−1.50	0.1573
X 2 (2L)	4.29	1.23	3.48	0.0040
X 2 (Q)	−1.00	1.23	−0.81	0.4325
X 3 (3L)	−0.35	1.23	−0.29	0.7781
X 3 (Q)	1.39	1.23	1.13	0.2789
X 4 (4L)	5.81	1.23	4.72	0.0004
X 4 (Q)	2.05	1.23	1.67	0.1192
1L by 2L	−0.69	1.51	−0.46	0.6529
1L by 3L	0.71	1.51	0.47	0.6472
1L by 4L	−2.38	1.51	−1.58	0.1382
2L by 3L	−1.52	1.51	−1.01	0.3320
2L by 4L	−1.21	1.51	−0.80	0.4379
3L by 4L	−3.13	1.51	−2.08	0.0581

L: linear term; Q: quadratic term