A Bark Thickness Model for White Spruce in Alaska Northern Forests

Table 3

Differences between predicted and observed bark thickness with the Alaska model on post-sample white spruce trees.

Area	mean (cm)	std (cm)	n
Copper River Valley	0.16	0.02	50
Delta area	0.13	0.20	15
Fairbanks area	0.31	0.16	82
Kenai Peninsula	0.09	0.06	50
Mat-Su Valley	0.09	0.02	50
Tok area	—	—	—
Overall	0.11	0.11	247

Note: std, standard deviation; n, number of sampled trees. There is no post-sample data from the Tok area.