Table 4.

AX content regression model analysis of variance

Source	Sum of square	df	Mean squares	F value	P value (Pr > F)	Significance
Model	67.66	20	3.38	15.17	< 0.0001	**
X1	20.32	1	20.32	91.11	< 0.0001	**
X2	2.00	1	2.00	8.96	0.0056	**
X3	0.040	1	0.040	0.18	0.6761
X4	22.90	1	22.90	102.67	< 0.0001	**
X5	5.10	1	5.10	22.85	< 0.0001	**
X1X2	0.70	1	0.70	3.14	0.0871
X1X3	0.69	1	0.69	3.11	0.0884
X1X4	0.049	1	0.049	0.22	0.6433
X1X5	0.018	1	0.018	0.079	0.7809
X2X3	0.37	1	0.37	1.67	0.2067
X2X4	5.25 × 10−3	1	5.25 × 10−3	0.024	0.8791
X2X5	0.055	1	0.055	0.25	0.6223
X3X4	0.33	1	0.33	1.50	0.2308
X3X5	1.53 × 10−4	1	1.53 × 10−4	6.8 × 10−4	0.9793
X4X5	0.98	1	0.98	4.38	0.0453	*
X12	4.89	1	4.89	21.94	< 0.0001	**
X22	1.56	1	1.56	7.01	0.0130	*
X32	1.89	1	1.89	8.48	0.0068	**
X42	9.74	1	9.74	43.68	< 0.0001	**
X52	1.31	1	1.31	5.87	0.0218	*
Residual	6.47	29	0.22
Lack of fit	5.61	22	0.26	2.10	0.1593
Error	0.85	7	0.12
Cor total	74.13	49

^**Extremely significantly (P < 0.01), *Significant (P < 0.05)