A Power Comparison of the Welch-James and Improved General Approximation Tests in the Split-Plot Design.

Algina, James; Keselman, H. J.

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Peer reviewed

ERIC Number: EJ572866

Record Type: Journal

Publication Date: 1998

Pages: N/A

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ISBN: N/A

ISSN: ISSN-1076-9986

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A Power Comparison of the Welch-James and Improved General Approximation Tests in the Split-Plot Design.

Algina, James; Keselman, H. J.

Journal of Educational and Behavioral Statistics, v23 n2 p152-69 Sum 1998

Power for the improved general approximation (IGA) and the Welch-James tests of the within-subjects (trials) main effects and the within-subjects x between-subjects (groups x trials) interaction was estimated for a design with one between- and one within-subjects factor. Results show that little if any power is sacrificed by using these methods. (SLD)

Descriptors: Power (Statistics), Research Design

Publication Type: Journal Articles; Reports - Evaluative

Education Level: N/A

Audience: N/A

Language: English

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Authoring Institution: N/A

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Author Affiliations: N/A