ERIC Number: EJ1177028
Record Type: Journal
Publication Date: 2018
Abstractor: As Provided
Equivalence of Population Variances: Synchronizing the Objective and Analysis
Mara, Constance A.; Cribbie, Robert A.
Journal of Experimental Education, v86 n3 p442-457 2018
Researchers are often interested in establishing equivalence of population variances. Traditional difference-based procedures are appropriate to answer questions about differences in some statistic (e.g., variances, etc.). However, if a researcher is interested in evaluating the equivalence of population variances, it is more appropriate to use a procedure designed to determine equivalence. A simulation study was used to compare novel equivalence-based tests to traditional variance homogeneity tests under common data conditions. Results demonstrated that traditional difference-based tests assess equality of variances from the wrong perspective and that the proposed Levene-Wellek-Welch test for equivalence of group variances the best performing test for detecting equivalence. An R function is provided in order to facilitate use of this test for equivalence of population variances.
Descriptors: Statistical Analysis, Differences, Comparative Analysis, Research Problems, Monte Carlo Methods
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A