Table 1.

Box–Behnken experimental design and results for extraction yields.

Run	Extraction Time (X1) (min)	Ultrasonic Temperature (X2) (°C)	Ultrasonic Power (X3) (W)	Extraction Yield (%)
				Actual Value	Predicted Value
1	50.00	80.00	220.00	11.93	11.80
2	50.00	70.00	180.00	11.26	11.48
3	40.00	70.00	220.00	12.77	12.61
4	40.00	80.00	180.00	9.44	9.34
5	40.00	60.00	260.00	9.03	9.13
6	40.00	70.00	220.00	12.59	12.61
7	40.00	70.00	220.00	12.88	12.61
8	40.00	80.00	260.00	11.82	11.81
9	30.00	70.00	260.00	10.91	10.69
10	50.00	70.00	260.00	11.96	12.09
11	50.00	60.00	220.00	11.14	10.91
12	30.00	60.00	220.00	6.13	6.25
13	30.00	80.00	220.00	10.09	10.32
14	30.00	70.00	180.00	6.89	6.76
15	40.00	70.00	220.00	12.36	12.61
16	40.00	70.00	220.00	12.43	12.61
17	40.00	60.00	180.00	7.05	7.06