A Note on Misconceptions Concerning Prospective and Retrospective Power

This paper addresses some misconceptions concerning prospective and retrospective power when journal editors, reviewers and readers want to know the observed power of statistical tests within a completed study. In addition, a practical solution to both the problem of computing the power after a stud...

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Veröffentlicht in:	Journal of the Royal Statistical Society. Series D (The Statistician) 1998-07, Vol.47 (2), p.385-388
Hauptverfasser:	Zumbo, Bruno D., Hubley, Anita M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Conditional probabilities Data analysis Effect size Exact sciences and technology Mathematical foundations Mathematics Misconception Null hypothesis Observational research Population mean Probabilities Probability and statistics Research design Sample size Sciences and techniques of general use Statistical power Statistical tests Statistics
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Beschreibung
Zusammenfassung:	This paper addresses some misconceptions concerning prospective and retrospective power when journal editors, reviewers and readers want to know the observed power of statistical tests within a completed study. In addition, a practical solution to both the problem of computing the power after a study has been conducted and the critical evaluation of null findings is suggested.
ISSN:	0039-0526 1467-9884
DOI:	10.1111/1467-9884.00139