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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 1 Statistical evaluation of the factors affecting the change in the L* value

From: Impact of thermal modification on color and chemical changes of spruce and oak wood

Monitored factor Sum of squares Degree of freedom Variance Fisher’s
F test
Significance level p
Absolute term 261,630.9 1 261,630.9 52,205.81 ***
Wood species “WS” 5768.6 1 5768.6 1151.07 ***
Thermal modification “TM” 17,369.4 3 5789.8 1155.29 ***
WS × TM 664.0 3 221.3 44.16 ***
Error 360.8 72 5.0   
  1. NS not significant
  2. ***Significant, p < 0.005