Angular transformation - Another effect of different sample sizes

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Abstract

Angular transformation has been widely used to analyze proportions or percentages in ecology. A new type of artifact can arise by applying angular transformation to proportions or percentages. Proportions with the same mean or expected value, but with different sample sizes (denominator of proportions), have different means or expected values after this transformation. Overdispersion causes a larger deviation of the expected value after the transformation. Angular transformation should be avoided unless the sample size (denominator of proportions) is the same for all the proportions analyzed.

Original languageEnglish
Pages (from-to)165-167
Number of pages3
JournalEcological Research
Volume19
Issue number2
DOIs
Publication statusPublished - Mar 2004

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics

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