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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
Stable URL: http://www.jstor.org/stable/1400610
Page Count: 12
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Altered Selection Probabilities Caused by Avoiding the Edge in Field Surveys
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Abstract

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.

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