You are here: Home
/ Publication Information
Title: An evaluation of percentile and maximum likelihood estimators of weibull paremeters
Author: Zarnoch, Stanley J.; Dell, Tommy R.;
Source: Forest Sci., Vol. 31(1): 260-268
Publication Series: Miscellaneous Publication
Description: Two methods of estimating the three-parameter Weibull distribution were evaluated by computer simulation and field data comparison. Maximum likelihood estimators (MLB) with bias correction were calculated with the computer routine FITTER (Bailey 1974); percentile estimators (PCT) were those proposed by Zanakis (1979). The MLB estimators had superior smaller bias and mean square error but larger variance than the PCT estimators. The MLB bias correction in FITTER increased the bias of parameter c, suggesting that for the three-parameter Weibull, the MLB estimators should be used without the correction. Comparisons of predicted percentages indicate that either MLB or PCT estimators,which are simpler to use, can model pine plantations equally well.
Keywords: FITTER, diameter distribution, Weibull distribution, growth and yield, modeling, estimation
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
XML: View XML
Zarnoch, Stanley J.; Dell, Tommy R. 1985. An evaluation of percentile and maximum likelihood estimators of weibull paremeters. Forest Sci., Vol. 31(1): 260-268
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility