Table 4.

Analysis of variance in Plackett–Burman.

Source	Sum of Squares	df	Mean Squares	F-Value	P-Value	Coefficient Estimate	Significance Ranking
Model	0.1173	5	0.0234	7.79	0.013
X1	0.048	1	0.048	15.92	0.007	0.0633	1
X2	0.0076	1	0.0076	2.5	0.165	0.0251	4
X3	0.0407	1	0.0407	13.5	0.01	-0.0583	2
X4	0.0016	1	0.0017	0.55	0.487	0.0118	5
X5	0.0194	1	0.0194	6.45	0.044	0.0403	3
Residual	0.0181	6	0.003
Cor total	0.1354	11