Table 2.

CCRD 2³ matrix for microwave-assisted oil extraction and its variables at the coded levels.

Run	Independent Variables			Dependent Variables
	Solid–Liquid Ratio (m/v) x1	Power (W) x2	Temperature (°C) x3	Oil Yield (%) Y
1	−1 (1:8)	−1 (100)	−1 (50)	10.40
2	1 (1:20)	−1 (100)	−1 (50)	27.90
3	−1 (1:8)	1 (250)	−1 (50)	14.10
4	1 (1:20)	1 (250)	−1 (50)	32.90
5	−1 (1:8)	−1 (100)	1 (60)	11.40
6	1 (1:20)	−1 (100)	1 (60)	31.40
7	−1 (1:8)	1 (250)	1 (60)	10.50
8	1 (1:20)	1 (250)	1 (60)	32.10
9	−1.68 (1:4)	0 (175)	0 (55)	9.50
10	1.68 (1:24)	0 (175)	0 (55)	31.60
11	0 (1:14)	−1.68 (50)	0 (55)	15.60
12	0 (1:14)	1.68 (300)	0 (55)	24.80
13	0 (1:14)	0 (175)	−1.68 (45)	24.10
14	0 (1:14)	0 (175)	1.68 (65)	24.90
15	0 (1:14)	0 (175)	0 (55)	23.80
16	0 (1:14)	0 (175)	0 (55)	29.00
17	0 (1:14)	0 (175)	0 (55)	26.40
18	0 (1:14)	0 (175)	0 (55)	25.10