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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 7 The significance of the effect of individual factors on changes in ΔE* 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 27,456.25 1 27,456.25 6004.204 ***
Wood species “WS” 56.89 1 56.89 12.440 ***
Thermal modification “TM” 18077.73 3 6025.91 1317.762 ***
WS × TM 255.27 3 85.09 18.608 ***
Error 329.24 72 4.57   
  1. NS not significant
  2. ***Significant, p < 0.005