Table 2. Rotatable CCD Experimental Design Matrix and Response (Y) for Each Run.

standard order	XA (°C)	XB (min)	XC (rpm)	Y (%)
1	6	30	300	79.0
2	10	30	300	73.0
3	6	50	300	89.0
4	10	50	300	88.2
5	6	30	500	87.0
6	10	30	500	90.6
7	6	50	500	93.2
8	10	50	500	81.2
9	4.64	40	400	84.7
10	11.36	40	400	80.5
11	8	23.18	400	86.0
12	8	56.82	400	88.2
13	8	40	231.82	84.2
14	8	40	568.18	88.9
15	8	40	400	87.0
16	8	40	400	86.5
17	8	40	400	87.2