Table 4. Duncan’s multi ranges test of interaction factor for the density

No Interaction factors Subset
1 2 3 4 5
1 Manii & Control glulam 0.4717
2 Manii & Solid wood 0.4833 0.4833
3 Manii & Polystyrene glulam 0.5283
4 Mangium & Solid wood 0.6167
5 Mangium & Control glulam 0.6417
6 Rubberwood & Solid wood 0.6983
7 Rubberwood & Control glulam 0.7333 0.7333
8 Rubberwood & Polystyrene glulam 0.7517
9 Mangium & Polystyrene glulam 0.7533