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      Simulación de ensayos en blanco para determinar la potencia estadística de experimentos en arroz Translated title: Uniformity trials simulation to determine the statistical power in yield rice trials

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          Abstract

          Resumen Introducción. El análisis prospectivo de la potencia estadística de una prueba de hipótesis debería ser una de las etapas más importantes de cualquier experimento, sin embargo, se omite con frecuencia. En Costa Rica, dentro de la bibliografía consultada, no se encontraron investigaciones relacionadas con este tema para experimentos de rendimiento en el cultivo de arroz. Objetivo. Simular ensayos en blanco para determinar la potencia estadística de un diseño completamente aleatorizado para experimentos de rendimiento de arroz en Bagaces, Costa Rica. Materiales y métodos. Se estimaron los parámetros del proceso de correlación espacial de un ensayo en blanco establecido en Bagaces, Costa Rica. Luego, las estimaciones se utilizaron para realizar 10 000 simulaciones de campos aleatorios de mayor tamaño, lo que permitió superponer diferente número de repeticiones y estimar la potencia lograda para detectar una diferencia del 10 % con respecto a la media en un experimento completamente aleatorizado a un nivel de significación del 5 %. Resultados. La potencia del 80 % se obtuvo con cinco repeticiones. Conclusión. En ensayos de rendimiento en arroz, para detectar una diferencia de medias del 10 % a un nivel de significación del 5 %, en esta investigación se requirió de cinco o más repeticiones.

          Translated abstract

          Abstract Introduction. Prospective analysis of the statistical power of a hypothesis test should be one of the most important stages in any experiment, however, it is frequently omitted. In Costa Rica, within the literature consulted, no research related to this topic was found for yield experiments in rice cultivation. Objective. To simulate uniformity trials to determine the power of a completely randomized design for rice yield experiments in Bagaces, Costa Rica. Materials and methods. The parameters of the spatial correlation process of a blank trial established in Bagaces, Guanacaste were estimated. Then, the estimates were used to perform 10 000 simulations of larger random fields, this allowed to superimpose different number of repetitions and estimate the power achieved to detect a difference of 10 % with respect to the mean in a completely randomized experiment at a significance level of 5 %. Results. The power of 80 % was obtained with five repetitions. Conclusion. In rice yield trials, to detect a mean difference of 10 % at a significance level of 5 %, this investigation required five or more repetitions.

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          Most cited references27

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          Statistics for Spatial Data

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            geoR: a package for geostatistical analysis

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              Analysis of Generalized Linear Mixed Models in the Agricultural and Natural Resources Sciences

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                Author and article information

                Journal
                am
                Agronomía Mesoamericana
                Agron. Mesoam
                Universidad de Costa Rica (San Pedro, San José, Costa Rica )
                1659-1321
                2215-3608
                April 2021
                : 32
                : 1
                : 196-208
                Affiliations
                [1] orgnameUniversidad de Costa Rica Costa Rica jorgeclaudio.vargas@ 123456ucr.ac.cr
                Article
                S1659-13212021000100196 S1659-1321(21)03200100196
                10.15517/am.v32i1.40870
                4dd7600a-4661-460f-9bcb-fa4153cdfe7a

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 03 March 2020
                : 03 September 2020
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 28, Pages: 13
                Product

                SciELO Costa Rica

                Categories
                Artículo

                number of repetitions,test power,geostatistical simulation,random fields,potencia de prueba,número de repeticiones,simulaciones geoestadísticas,campos aleatorios

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