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Altered Selection Probabilities Caused by Avoiding the Edge in Field Surveys
Timothy G. Gregoire and Charles T. Scott
Journal of Agricultural, Biological, and Environmental Statistics
Vol. 8, No. 1 (Mar., 2003), pp. 36-47
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/1400610
Page Count: 12
You can always find the topics here!Topics: Population estimates, Estimators, Trees, Estimation bias, Sampling bias, Saplings, Forestry research, Forest management, Edge effects, Estimation methods
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When field plots are prevented from overlapping the boundary of the tract being sampled, the selection probabilities of population elements near the edge differ from what they are when plots are permitted to overlap the boundary. In both situations, selection probabilities of edge elements differ from those of elements located far to the interior of the tract. An analytical expression and graphical depiction of the altered selection probabilities are presented, accompanied by an empirical study of the consequences on estimation for the situation where plots are pulled back from the edge until just tangent with the boundary.
Journal of Agricultural, Biological, and Environmental Statistics © 2003 International Biometric Society