An expert system for the calculation of sample size.

Mark H. Ebell, A. V. Neale, B. J. Hodgkins

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Calculation of sample size is a useful technique for researchers who are designing a study, and for clinicians who wish to interpret research findings. The elements that must be specified to calculate the sample size include alpha, beta, Type I and Type II errors, 1- and 2-tail tests, confidence intervals, and confidence levels. A computer software program written by one of the authors (MHE), Sample Size Expert, facilitates sample size calculations. The program uses an expert system to help inexperienced users calculate sample sizes for analytic and descriptive studies. The software is available at no cost from the author or electronically via several on-line information services.

Original languageEnglish (US)
Pages (from-to)183-195
Number of pages13
JournalThe Family practice research journal
Volume14
Issue number2
StatePublished - Jun 1 1994
Externally publishedYes

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ASJC Scopus subject areas

  • Medicine(all)

Cite this

Ebell, M. H., Neale, A. V., & Hodgkins, B. J. (1994). An expert system for the calculation of sample size. The Family practice research journal, 14(2), 183-195.