Official Journal of the Japan Wood Research Society
Table 7 Analysis of variance results for surface brightness values
Factors | Degrees of freedom | Sum of squares | Mean square | F value | Level of significance (P ≤ 0.05) |
|---|---|---|---|---|---|
Densification (A) | 4 | 52.609 | 13.152 | 2.6437 | 0.0337* |
Heat treatment (B) | 2 | 2232.142 | 1116.071 | 224.3359 | 0.0000* |
Interaction (AB) | 8 | 17.312 | 2.164 | 0.4350 | Ns |
Varnish type (C) | 2 | 293,270.6 | 146,635.3 | 29,474.43 | 0.0000* |
Interaction (AC) | 8 | 6.645 | 0.831 | 0.1669 | Ns |
Interaction (BC) | 4 | 889.969 | 222.492 | 44.7221 | 0.0000* |
Interaction (ABC) | 16 | 27.430 | 1.714 | 0.3446 | Ns |
Error | 315 | 1567.125 | 4.975 | ||
Total | 359 | 298,063.8 |