An Alternative to Clay in Building Materials: Red Mud Sintering Using Fly Ash via Taguchi’s Methodology

Table 4

ANOVA table.

Factors	Total variance of each factor	Degree of freedom	Variance	Variance ratio	Pure sum of sq.	Percent contribution
A	0.001	2	0.000	10.5651	0.00062816	1.090
B	0.002	2	0.001	29.82904	0.00189326	3.079
C	0.000	2	0.000	4.087215	0.00020274	0.422
D	0.060	2	0.030	915.4204	0.06005186	94.480
Error	0.001	18	0.000	1	0.00032836	0.929
Totals	0.064	26	0.032			100.000