The use of pilot study data in the estimation od sample size
In the two sample binomial case, one approach to the estimation of sample size is to conduct a pilot study and assume that the observed proportion in the pilot study have no sampling error and are in fact true population parameter which can be used directly in standard sample size formulas. This app...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Universidad Nacional de Colombia
1985-06-01
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| Series: | Revista Colombiana de Estadística |
| Subjects: | |
| Online Access: | http://www.revistas.unal.edu.co/index.php/estad/article/view/9874 |
| _version_ | 1811267744702660608 |
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| author | Roser Bernard Muñoz Alvaro |
| author_facet | Roser Bernard Muñoz Alvaro |
| author_sort | Roser Bernard |
| collection | DOAJ |
| description | In the two sample binomial case, one approach to the estimation of sample size is to conduct a pilot study and assume that the observed proportion in the pilot study have no sampling error and are in fact true population parameter which can be used directly in standard sample size formulas. This approach has conceptual difficultie swhen such a pilot study is small since there is typically considerable error in the observed proportions. In this paper; we propose an lternative method which takes into account the sampling error in pilot study data in the estimation of sample size for a larger study. Tables are provided comparing these two methods and it is shown that the former deterministic method may provide a grossly inaccurate estímate of the appropriate sample size for alarger study, partlcularly for small pilot studies. |
| first_indexed | 2024-04-12T21:08:23Z |
| format | Article |
| id | doaj.art-7cd0606cff3b425f890a7db3bcad752b |
| institution | Directory Open Access Journal |
| issn | 0120-1751 |
| language | English |
| last_indexed | 2024-04-12T21:08:23Z |
| publishDate | 1985-06-01 |
| publisher | Universidad Nacional de Colombia |
| record_format | Article |
| series | Revista Colombiana de Estadística |
| spelling | doaj.art-7cd0606cff3b425f890a7db3bcad752b2022-12-22T03:16:39ZengUniversidad Nacional de ColombiaRevista Colombiana de Estadística0120-17511985-06-01611The use of pilot study data in the estimation od sample sizeRoser BernardMuñoz AlvaroIn the two sample binomial case, one approach to the estimation of sample size is to conduct a pilot study and assume that the observed proportion in the pilot study have no sampling error and are in fact true population parameter which can be used directly in standard sample size formulas. This approach has conceptual difficultie swhen such a pilot study is small since there is typically considerable error in the observed proportions. In this paper; we propose an lternative method which takes into account the sampling error in pilot study data in the estimation of sample size for a larger study. Tables are provided comparing these two methods and it is shown that the former deterministic method may provide a grossly inaccurate estímate of the appropriate sample size for alarger study, partlcularly for small pilot studies.http://www.revistas.unal.edu.co/index.php/estad/article/view/9874Estadística matemáticaTamaño de la muestraCurvas de potenciaDistribución binomialInferencia bayesianaEstudio piloto |
| spellingShingle | Roser Bernard Muñoz Alvaro The use of pilot study data in the estimation od sample size Revista Colombiana de Estadística Estadística matemática Tamaño de la muestra Curvas de potencia Distribución binomial Inferencia bayesiana Estudio piloto |
| title | The use of pilot study data in the estimation od sample size |
| title_full | The use of pilot study data in the estimation od sample size |
| title_fullStr | The use of pilot study data in the estimation od sample size |
| title_full_unstemmed | The use of pilot study data in the estimation od sample size |
| title_short | The use of pilot study data in the estimation od sample size |
| title_sort | use of pilot study data in the estimation od sample size |
| topic | Estadística matemática Tamaño de la muestra Curvas de potencia Distribución binomial Inferencia bayesiana Estudio piloto |
| url | http://www.revistas.unal.edu.co/index.php/estad/article/view/9874 |
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