Table 3.

Central composite design matrix and its response and predicted value.

Run	Experimental Variables				Response Y (%)
	S (g/L)	P	T (°C)	E (g/L)	Expt.	Predicted
1	13	4.5	50	0.4	22.25	23.13
2	27	4.5	50	0.4	17.74	17.75
3	13	5.5	50	0.4	31.36	32.21
4	27	5.5	50	0.4	29.52	28.77
5	13	4.5	60	0.4	29.43	29.15
6	27	4.5	60	0.4	16.30	17.65
7	13	5.5	60	0.4	33.72	32.99
8	27	5.5	60	0.4	23.95	23.43
9	13	4.5	50	0.6	22.57	22.30
10	27	4.5	50	0.6	14.38	15.13
11	13	5.5	50	0.6	31.47	31.38
12	27	5.5	50	0.6	25.41	26.15
13	13	4.5	60	0.6	30.56	31.33
14	27	4.5	60	0.6	19.68	18.04
15	13	5.5	60	0.6	34.72	35.17
16	27	5.5	60	0.6	23.43	23.81
17	6	5.0	55	0.5	28.55	27.99
18	34	5.0	55	0.5	11.19	11.27
19	20	4.0	55	0.5	19.62	19.07
20	20	6.0	55	0.5	33.85	33.93
21	20	5.0	45	0.5	26.02	25.2
22	20	5.0	65	0.5	28.54	28.89
23	20	5.0	55	0.3	29.31	29.14
24	20	5.0	55	0.7	29.01	28.70
25	20	5.0	55	0.5	32.51	32.12
26	20	5.0	55	0.5	32.71	32.12
27	20	5.0	55	0.5	32.64	32.12
28	20	5.0	55	0.5	32.28	32.12
29	20	5.0	55	0.5	31.69	32.12
30	20	5.0	55	0.5	30.87	32.12