Table 3. Factorial 3-way ANOVA for the interaction effect of the inde-pendent variables (root level, post, cement).

Source	Type III Sum of Squares	df	Mean Square	F	P
Corrected Model	2877.035	7	411.005	7.618	0.000
	8780.288	1	8780.288	162.739	0.000
Root level	316.318	1	316.318	5.863	0.018
Post	251.619	1	251.619	4.664	0.034
Cement	1310.690	1	1310.690	24.293	0.000
Root level * Post	724.571	1	724.571	13.430	0.000
Root level * Cement	35.966	1	35.966	0.667	0.416
Post * Cement	12.042	1	12.042	0.223	0.638
Root level * Post * Cement	225.829	1	225.829	4.186	0.044
Error	4747.872	88	53.953
Total	16405.194	96
Corrected Total	7624.906	95
P< 0.05 is statistically significant