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ERIC Number: EJ1081098
Record Type: Journal
Publication Date: 2016
Pages: 15
Abstractor: As Provided
Reference Count: 41
ISBN: N/A
ISSN: ISSN-0022-0973
Allocating Sample Sizes to Reduce Budget for Fixed-Effect 2×2 Heterogeneous Analysis of Variance
Luh, Wei-Ming; Guo, Jiin-Huarng
Journal of Experimental Education, v84 n1 p197-211 2016
This article discusses the sample size requirements for the interaction, row, and column effects, respectively, by forming a linear contrast for a 2×2 factorial design for fixed-effects heterogeneous analysis of variance. The proposed method uses the Welch t test and its corresponding degrees of freedom to calculate the final sample size in a 2-step procedure. The simulation results show that the proposed sample size allocation ratio can minimize the sampling cost, while at the same time the designated power is achieved. The article concludes with a discussion to reiterate the importance of sample size planning, especially for testing the iteration effect.
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A