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ERIC Number: EJ584921
Record Type: CIJE
Publication Date: 1999
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISSN: ISSN-1076-9986
Sample Size Estimation for Longitudinal Designs with Attrition: Comparing Time-Related Contrasts between Two Groups.
Hedecker, Donald; Gibbons, Robert D.; Waternaux, Christine
Journal of Educational and Behavioral Statistics, v24 n1 p70-93 Spr 1999
Presents formulas for estimating sample sizes to provide specified levels of power for tests of significance from a longitudinal design allowing for subject attrition. These formulas are derived for a comparison of two groups in terms of single degree-of-freedom contrasts of population means across the study timepoints. (Author/SLD)
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A