Table 4.

Box–Behnken design with experimental and predicted values of mycelial protein content.

Run	Coded levels of variables			Protein content (%)
	X1	X2	X3	Actual value	Predicted value	Residual
1	0	1	−1	1.54 ± 0.12	1.54	0.00
2	0	0	0	2.03 ± 0.02	2.07	−0.04
3	−1	0	−1	1.48 ± 0.01	1.51	−0.03
4	0	−1	−1	1.84 ± 0.06	1.81	0.04
5	−1	0	1	1.98 ± 0.08	1.97	0.01
6	0	0	0	2.08 ± 0.03	2.07	0.01
7	−1	1	0	1.99 ± 0.13	1.97	0.02
8	1	0	−1	1.65 ± 0.01	1.66	−0.01
9	1	0	1	1.95 ± 0.02	1.92	0.03
10	0	0	0	2.09 ± 0.03	2.07	0.02
11	1	1	0	2.09 ± 0.09	2.08	0.01
12	0	1	1	2.05 ± 0.01	2.09	−0.04
13	0	−1	1	1.97 ± 0.03	1.98	−0.01
14	0	0	0	2.07 ± 0.04	2.07	0.00
15	0	0	0	2.08 ± 0.01	2.07	0.01
16	1	−1	0	2.08 ± 0.11	2.1	−0.02
17	−1	−1	0	2.10 ± 0.08	2.11	−0.01