Sample size for detecting significant differences among treatments

Authors

  • Marcos Deon Vilela de Resende Embrapa Florestas
  • José Alfredo Sturion Embrapa Florestas
  • José Carlos Duarte Pereira Embrapa Florestas

Keywords:

Experimental Statistics, Sampling, Scientific Research.

Abstract

Sample sizes required for the detection of significant differences among experimental treatments in scientific research are presented. An approach based on the magnitude of the coefficient of determination (R2) among treatments was used. The required sample sizes decrease with increase in R2. For detecting true differences with magnitudes of one standard deviation of the trait, the required sample size are 15 to 5 for R2 ranging from 5% to 70%.

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References

RESENDE, M. D. V. Genética biométrica e estatística no melhoramento de plantas perenes. Brasília: Embrapa Informação Tecnológica; Colombo: Embrapa Florestas, 2002. 975 p.
SNEDECOR, G. W.; COCHRAN, W. G. Statistical methods. 6th ed. Iowa: Iowa State University Press, 1967. 507 p.
STEEL, R. G. D.; TORRIE, J. H. Principles and procedures of statistics. 2th ed. New York: Mc Graw-Hill, 1980. 633 p.

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Published

2004-12-30

How to Cite

RESENDE, Marcos Deon Vilela de; STURION, José Alfredo; PEREIRA, José Carlos Duarte. Sample size for detecting significant differences among treatments. Pesquisa Florestal Brasileira, [S. l.], n. 49, p. 109–120, 2004. Disponível em: https://pfb.sede.embrapa.br/pfb/article/view/1590. Acesso em: 31 oct. 2025.

Issue

No. 49 (2004): jul./dez.

Section

Scientific Notes

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