Table 2.

Experimental design matrix showing the actual and predicted MG removal (%) by the GO–ZnO nanohybrid.

Std	Run	Block	Independent variables					R% MG
			X1	X2	X3	X4	X5	Actual value	Predicted value
1	13	Block 1	12	5.0	12	20	12	56.45	55.75
2	7	Block 1	24	5.0	12	20	6	6.29	4.645
3	12	Block 1	12	9.0	12	20	6	63.45	63.16
4	8	Block 1	24	9.0	12	20	12	85.23	85.21
5	4	Block 1	12	5.0	24	20	6	47.45	46.99
6	5	Block 1	24	5.0	24	20	12	67.56	67.37
7	2	Block 1	12	9.0	24	20	12	95.45	96.61
8	16	Block 1	24	9.0	24	20	6	87.56	87.77
9	10	Block 1	12	5.0	12	40	6	67.56	66.95
10	18	Block 1	24	5.0	12	40	12	42.23	41.89
11	20	Block 1	12	9.0	12	40	12	92.57	93.58
12	6	Block 1	24	9.0	12	40	6	65.34	65.41
13	25	Block 1	12	5.0	24	40	12	58.34	59.18
14	3	Block 1	24	5.0	24	40	6	73.23	73.13
15	30	Block 1	12	9.0	24	40	6	89.36	90.61
16	23	Block 1	24	9.0	24	40	12	79.02	80.54
17	22	Block 1	6.0	7.0	18	30	9	96.54	95.65
18	15	Block 1	30	7.0	18	30	9	78.48	78.94
19	32	Block 1	18	3.0	18	30	9	29.00	30.82
20	26	Block 1	18	11	18	30	9	94.81	92.57
21	31	Block 1	18	7.0	6.0	30	9	43.56	45.04
22	29	Block 1	18	7.0	30	30	9	78.34	76.44
23	19	Block 1	18	7.0	18	10	9	64.50	65.69
24	11	Block 1	18	7.0	18	50	9	83.26	81.64
25	1	Block 1	18	7.0	18	30	3	58.91	59.91
26	27	Block 1	18	7.0	18	30	15	81.70	80.27
27	17	Block 1	18	7.0	18	30	9	82.23	83.78
28	9	Block 1	18	7.0	18	30	9	82.98	83.78
29	24	Block 1	18	7.0	18	30	9	85.23	83.78
30	28	Block 1	18	7.0	18	30	9	83.45	83.78
31	21	Block 1	18	7.0	18	30	9	84.71	83.78
32	14	Block 1	18	7.0	18	30	9	83.68	83.78