Table 3.

ANOVA results of RSM model for pure water permeability.

Source	Sum of Squares	Degree of Freedom	Mean Square	F-value	p-value
Model	3151.00	14	225.07	19.24	< 0.0001	Significant
A-Dope solution rate	123.55	1	123.55	10.56	0.0054
B-Bore fluid rate	157.79	1	157.79	13.49	0.0023
C-Air gap distance	1151.01	1	1151.01	98.38	< 0.0001
D-Concentration	442.06	1	442.06	37.78	< 0.0001
AB	5.56	1	5.56	0.4754	0.5010
AC	5.99	1	5.99	0.5116	0.4854
AD	69.42	1	69.42	5.93	0.0278
BC	25.56	1	25.56	2.18	0.1601
BD	107.54	1	107.54	9.19	0.0084
CD	64.01	1	64.01	5.47	0.0336
A²	0.9125	1	0.9125	0.0780	0.7839
B²	24.90	1	24.90	2.13	0.1652
C²	62.40	1	62.40	5.33	0.0356
D²	787.88	1	787.88	67.34	< 0.0001
Residual	175.50	15	11.70
Lack of Fit	121.82	10	12.18	1.13	0.4725	not significant
Pure Error	53.68	5	10.74
Cor Total	3326.50	29