Table 7.

Analysis of variance (ANOVA) summary and regression analysis of granules dependent responses. CI, confidence interval.

Variables	Coefficient Estimate	Sum of Squares	Standard Error	F-Value	p-Value	95% CI Low	95% CI High
Mean Granule Size (Linear Model)
Model	-	-	-	72.53	<0.0001	-	-
Intercept	373.16	-	7.50	-	-	354.81	391.50
X1	101.84	62,230.35	9.18	123.02	<0.0001	79.37	124.31
X2	43.11	11,150.83	9.18	22.04	0.0033	20.64	65.58
Percent Fines (Linear Model)
Model	-	-	-	577.35	<0.0001	-	-
Intercept	14.42	-	0.2309	-	-	13.86	14.99
X1	−9.12	499.05	0.2828	1039.91	<0.0001	−9.81	−8.43
X2	−3.03	55.09	0.2828	114.79	<0.0001	−3.72	−2.34
Bulk Density (2FI Model)
Model	-	-	-	64.06	0.0002	-	-
Intercept	0.3399	-	0.0027	-	-	0.3331	0.3467
X1	0.0363	0.0079	0.0032	125.24	<0.0001	0.0280	0.0447
X2	0.0250	0.0038	0.0032	59.29	0.0006	0.0167	0.0333
X1X2	0.0110	0.0005	0.0040	7.65	0.0395	0.0008	0.0212
Angle of Repose (Linear Model)
Model	-	-	-	42.64	0.0003	-	-
Intercept	28.46	-	0.2989	-	-	27.72	29.19
X1	−3.21	61.89	0.3661	76.95	0.0001	−4.11	−2.32
X2	−1.06	6.70	0.3661	8.33	0.0278	−1.95	−0.1608

X₁ and X₂ represent the amount of added water and the PGS amount, respectively; X₁X₂ is the effect of interaction.