Table 4. Analysis of variance (ANOVA) for the determination of physical properties of LRM
| Source of variance | Retention rate (kg/m3) |
| Sum of squares | df | MS | F-value | p-value | Partial eta squared |
| Corrected model | 2,250.135 | 11 | 204.558 | 99.990 | < 0.000 | 0.958 |
| Intercept | 3,768.594 | 1 | 3,768.594 | 1,842.131 | < 0.000 | 0.975 |
| BA concentration (a) | 1,591.311 | 3 | 530.437 | 259.284 | < 0.000 | 0.942 |
| Size (b) | 444.217 | 2 | 222.108 | 108.569 | < 0.000 | 0.819 |
| a × b | 214.607 | 6 | 35.768 | 17.484 | < 0.000 | 0.686 |
| Error | 98.197 | 48 | 2.046 | | | |
| Total | 6,116.926 | 60 | | | | |
| Correct total | 2,348.332 | 59 | | | | |
LRM: light red meranti, BA: boric acid, df: degree of freedom, MS: square of mean.