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Assessment of sampling stability in ecological applications of discriminant analysis

Ecology

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Abstract

A simulation study was undertaken to assess the sampling stability of the variable loadings in linear discriminant function analysis. A factorial design was used for the factors of multivariate dimensionality, dispersion structure, configuration of group means, and sample size. A total of 32,400 discriminant analyses were conducted, based on data from simulated populations with appropriate underlying statistical distributions. A review of 60 published studies and 142 individual analyses indicated that sample sizes in ecological studies often have met that requirement. However, individual group sample sizes frequently were very unequal, and checks of assumptions usually were not reported. The authors recommend that ecologists obtain group sample sizes that are at least three times as large as the number of variables measured.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Assessment of sampling stability in ecological applications of discriminant analysis
Series title:
Ecology
Volume
69
Issue:
4
Year Published:
1988
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
1275-1285
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1275
Last page:
1285
Number of Pages:
11