Statistics review 4: Sample size calculations

The present review introduces the notion of statistical power and the hazard of under-powered studies. The problem of how to calculate an ideal sample size is also discussed within the context of factors that affect power, and specific methods for the calculation of sample size are presented for two...

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Detalles Bibliográficos
Autores principales: Whitley, Elise, Ball, Jonathan
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2002
Materias:
Review
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC137461/
https://www.ncbi.nlm.nih.gov/pubmed/12225610
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author Whitley, Elise
Ball, Jonathan
author_facet Whitley, Elise
Ball, Jonathan
author_sort Whitley, Elise
collection PubMed
description The present review introduces the notion of statistical power and the hazard of under-powered studies. The problem of how to calculate an ideal sample size is also discussed within the context of factors that affect power, and specific methods for the calculation of sample size are presented for two common scenarios, along with extensions to the simplest case.
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spelling pubmed-1374612003-02-27 Statistics review 4: Sample size calculations Whitley, Elise Ball, Jonathan Crit Care Review The present review introduces the notion of statistical power and the hazard of under-powered studies. The problem of how to calculate an ideal sample size is also discussed within the context of factors that affect power, and specific methods for the calculation of sample size are presented for two common scenarios, along with extensions to the simplest case. BioMed Central 2002 2002-05-10 /pmc/articles/PMC137461/ /pubmed/12225610 Text en Copyright © 2002 BioMed Central Ltd
spellingShingle Review
Whitley, Elise
Ball, Jonathan
Statistics review 4: Sample size calculations
title Statistics review 4: Sample size calculations
title_full Statistics review 4: Sample size calculations
title_fullStr Statistics review 4: Sample size calculations
title_full_unstemmed Statistics review 4: Sample size calculations
title_short Statistics review 4: Sample size calculations
title_sort statistics review 4: sample size calculations
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC137461/
https://www.ncbi.nlm.nih.gov/pubmed/12225610
work_keys_str_mv AT whitleyelise statisticsreview4samplesizecalculations
AT balljonathan statisticsreview4samplesizecalculations

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