Table 2.

Plackett-Burman experimental design of 12 trials for eleven variables (9 nutrients + 2 dummy) and observed concentration of lovastatin in angkak samples.

Trial	X1	X2	X3	X4	X5	D1	X6	X7	X8	X	D2	Mean lovastatin (mg g-1)
1	+	+	-	+	+	+	-	-	-	+	-	1.060
2	-	+	+	-	+	+	+	-	-	-	+	0.563
3	+	-	+	+	-	+	+	+	-	-	-	0.764
4	-	+	-	+	+	-	+	+	+	-	-	0.450
5	-	-	+	-	+	+	-	+	+	+	-	1.880
6	-	-	-	+	-	+	+	-	+	+	+	1.990
7	+	-	-	-	+	-	+	+	-	+	+	1.780
8	+	+	-	-	-	+	-	+	+	-	+	0.764
9	+	+	+	-	-	-	+	-	+	+	-	1.760
10	-	+	+	+	-	-	-	+	-	+	+	1.080
11	+	-	+	+	+	-	-	-	+	-	+	0.984
12	-	-	-	-	-	-	-	-	-	-	-	0.534