MANOVA Simultaneous Test Procedures : The Power and Robustness of Restricted Multivariate Contrast  

Oleh:

Sheehan-Holt, Janet K.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Educational and Psychological Measurement vol. 58 no. 6 (1998), page 861-881.
Topik: power; multivariate analysis; monte carlo simulation; tests; social research
Fulltext: 861.pdf (1.89MB)

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Perpustakaan Pusat (Semanggi) Nomor Panggil: EE30.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

A monte carlo study was conducted using SAS - IML to compare the multivariate analysis of variance (MANOVA) simultaneous test procedures (STPs) of O, T, A and V in term of power and type I error under various conditions including violations of MANOVA assumptions. The type I error rates of moderately restricted contrasts in STPs were robust to violations of MANOVA assumptions such that the actual alpha remained below the nominal alpha. However, the power of the STPs was unacceptably low in moderately restricted contrasts under most conditions. For partially restricted contrasts, the power of the STPs was adequate for O when the non centrality structure was concentrated. When the non centrality structure was difusse, again O had the highest power but decreased to a minimal level as the number of groups or variables increased.

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