Notes: Sample Sizes and Estimation Methods for the Weibull Distribution for Unthinned Slash Pine Plantation Diameter Distributions
Author: Shiver, Barry D.
Source: Forest Science, Volume 34, Number 3, 1 September 1988 , pp. 809-814(6)
Publisher: Society of American Foresters
Abstract:Three methods were evaluated over four sample sizes for prediction of diameter distributions in unthinned site prepared slash pine plantations. Maximum likelihood estimation provided the best estimates of known distribution parameters. Under the likely assumption that there are no specific underlying parameters, both modified moments estimation and a percentile estimator reproduce the underlying distribution of diameters as well or better than maximum likelihood estimation. All three methods require approximately 50 tree samples to reproduce distributions into classes with less than 10% error in any class. For. Sci. 34(3):809-814.
Document Type: Miscellaneous
Affiliations: Assistant Professor of Forest Resources, School of Forest Resources, University of Georgia, Athens, Georgia 30602
Publication date: September 1, 1988
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