Table 3.

Full factorial design and experimental responses for each design point.

Run	X1	X2	X3	X4	Fiber diameter (Y1) [nm]	Bead amount (Y2)
1	−1	−1	−1	−1	297	0.76
2	+1	−1	−1	−1	554	0.05
3	−1	+1	−1	−1	378	1.04
4	+1	+1	−1	−1	741	0.02
5	−1	−1	+1	−1	309	0.80
6	+1	−1	+1	−1	774	0.03
7	−1	+1	+1	−1	448	1.04
8	+1	+1	+1	−1	695	0.02
9	−1	−1	−1	+1	315	1.20
10	+1	−1	−1	+1	714	0.16
11	−1	+1	−1	+1	549	0.43
12	+1	+1	−1	+1	830	0.03
13	−1	−1	+1	+1	357	0.96
14	+1	−1	+1	+1	783	0.03
15	−1	+1	+1	+1	544	0.42
16	+1	+1	+1	+1	888	0.03
17	0	0	0	0	394	0.75
18	0	0	0	0	411	0.65
19	0	0	0	0	335	0.78