Bulletin of the Faculty of Agriculture, Shimane University

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Bulletin of the Faculty of Agriculture, Shimane University 16
1982-12-20 発行

対数正規分布とその応用(第1報) : 直径分布へのあてはめ

Lognormal distribution and its applications : Fitting to diameter distributions
Yamamoto, Mitsuo
Yasui, Hitoshi
Honda, Hideaki
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Description
Diameter distributions of Jack pine can be discribed by the three-parameter lognormal distribution, in which the variate is x=log(y+y_0). Agreement between the observed and the expected frequencies is tested by the chi-square test. On comparing the normal and the lognormal distributions the normal achieves a good fit to the young stands and the lognormal does to the old stands.