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On testing for seed sample heterogeneity with the exact probability distribution of the germination count range

Published online by Cambridge University Press:  30 April 2020

Anderson Rodrigo da Silva Open the ORCID record for Anderson Rodrigo da Silva [Opens in a new window]
Anderson Rodrigo da Silva*
Affiliation:
Statistics and Geoprocessing Lab., Instituto Federal Goiano, Rod. Geraldo S. Nascimento, km 2.5, Urutaí CEP 75790-000, GO, Brazil
*
Author for correspondence: Anderson Rodrigo da Silva, E-mail: anderson.silva@ifgoiano.edu.br
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Abstract

Seed lot heterogeneity is often evaluated through the range between germination percentages of four seed samples, considering normal and binomial approximations for calculating the tolerated range (S). In this paper, an exact test for the germination count range (R) is derived based on the hypergeometric and the binomial probability model for germination count. Through Monte Carlo simulations, the empirical distribution of R is built to evaluate the quantiles of the exact distributions. Moreover, a power analysis is performed by simulation. Sample size and germination rate effects are evaluated. In lots with a high germination rate, the proposed test based on the hypergeometric model is about 20% more powerful than the test based on the S-value. A table containing the critical values is presented and recommended to be used in off-range heterogeneity testing.

Keywords

germination testhypergeometric distributionnormal seedlingsR-valueS-value
Type
Technical Update
Information
Seed Science Research , Volume 30 , Issue 1 , March 2020 , pp. 59 - 63
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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References

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