Planning Educational Research

Stephen F. Olejnik

120 citations0/0 files storedThe Journal of Experimental Education

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Educational Research and Methods Statistical Methods in Clinical Trials Statistical Methods in Epidemiology

Abstract

In planning a research study, investigators are frequently uncertain regarding the minimal number of subjects needed to adequately test a hypothesis of interest. The present paper discusses the sample size problem and four factors which affect its solution: significance level, statistical power, analysis procedure, and effect size. The interrelationship between these factors is discussed and demonstrated by calculating minimal sample size requirements for a variety of research conditions.

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2013Experimental Design: Procedures for the Behavioral Sciences 1973Review of research in education 1982Educational Outcomes of Tutoring: A Meta-analysis of Findings 19779: Integrating Findings: The Meta-Analysis of Research 1980Fundamentals of experimental design.1980Effectiveness of Computer-based College Teaching: A Meta-analysis of Findings 1983Effects of computer-based teaching on secondary school students.1982Effects of Ability Grouping on Secondary School Students: A Meta-analysis of Evaluation Findings

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