Assessing the Applicability of Photocatalytic-Concrete Blocks in Reducing the Concentration of Ambient NO₂ of Chandigarh, India, Using Box–Behnken Response Surface Design Technique: A Holistic Sustainable Development Approach

Table 3

ANOVA test for response parameters.

Source	Sum of squares	df	Mean square	F value	value
	Y1	Y1	Y1	Y1	Y1
Model	4040.87	9	448.99	61.32	<0.0001
X1	220.53	1	220.50	30.12	0.0009
X2	1275.13	1	1275.13	174.16	<0.0001
X3	378.13	1	378.13	51.65	0.0002
X1X2	12.25	1	12.25	1.67	0.2368
X1X3	0.25	1	0.25	0.0341	0.8586
X2X3	25	1	25	3.41	0.1071
X1^2	1769.47	1	1769.47	241.68	<0.0001
X2^2	95	1	95	12.98	0.0087
X3^3	139.21	1	139.21	19.01	0.0033
Residual	15.25	7	7.32
Lack of fit	15.25	3	17.08		0.017
Pure error	0	4	0
Total (corr)	4092.12	16