Table 17.

ANOVA results for $D_{app}$.

Variance Source	Sum of Squares	Df	Mean Square	F Value	Significance	Contribution of Factor (%)
$w/b$	150.521	2	75.261	43.830	0.000	74.32
GGBS content	23.328	5	4.666	2.717	0.101	7.45
Fiber content Δ	2.312	2	1.156
Solution concentration	10.314	2	5.157	3.003	0.106	3.48
Error	11.425	6	1.904
Error Δ	13.737	8	1.717
Total	197.900	17

Note: The effect of fiber content is within the error.