Investigation of Corrosion Rate of Mild Steel in Fruit Juice Environment Using Factorial Experimental Design

Table 4

Analysis of variance (ANOVA) of general factorial design.

(a)

Source	DF	Adj. SS	Adj. MS	value	value
Model	21	0.64027	0.030489	11.15	0.001
Linear	7	0.55017	0.078595	28.74	0.000
	2	0.02249	0.011243	4.11	0.059
	4	0.31935	0.079837	29.19	0.000
	1	0.20833	0.208333	76.17	0.000
2-way interactions	14	0.09010	0.006436	2.35	0.113
	8	0.02661	0.003327	1.22	0.394
	2	0.04149	0.020743	7.58	0.014
	4	0.02200	0.005500	2.01	0.186
Error	8	0.02188	0.002735
Total	29	0.66215

(b) Model summary

	R-sq	R-sq (adj)	R-sq (pred)
0.0522972	96.7%	88.02%	53.53%