Journal of Engineering and Applied Science

Table 1 Experimental design variables in terms of actual and coded variables

From: Machine learning algorithm and neural network architecture for optimization of pharmaceutical and drug manufacturing industrial effluent treatment using activated carbon derived from breadfruit (Treculia africana)

Factor	Name	Units	Coded low	Coded high	Mean	Std. dev
A	Contact time	Minutes	− 1 ↔ 10.00	+ 1 ↔ 50.00	28.10	17.78
B	Dosage	mg/L	− 1 ↔ 0.50	+ 1 ↔ 2.50	1.50	0.8263
C	pH	-	− 1 ↔ 6.00	+ 1 ↔ 8.00	7.00	1.67
D	Particle size	mm	− 1 ↔ 0.15	+ 1 ↔ 1.00	0.5386	0.3634

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