Screening the Main Factors Affecting the Wear of the Scraper Conveyor Chute Using the Plackett–Burman Method

Table 7

The analysis of variance results.

Source of variation	Degree of freedom	Sum of squares	Mean square	F value	P value
					(Prob>F)
Model	6	79539.37	13256.56	11.04	0.0093
A	1	43212	43212	35.98	0.0018
B	1	10144.27	10144.27	8.45	0.0335
C	1	6052.52	6052.52	5.04	0.0748
D	1	694.64	694.64	0.58	0.4813
E	1	15834.07	15834.07	13.18	0.015
F	1	3601.87	3601.87	3	0.1439
Residual	5	6005.42	1208.08
Total	11	85544.78
R^2=0.9298	R^2 Adj =0.8456	Adeq precision=9.476