Open Journal of Statistics

Volume 4, Issue 11 (December 2014)

ISSN Print: 2161-718X   ISSN Online: 2161-7198

Google-based Impact Factor: 0.53  Citations  

On Rotational Robustness of Shapiro-Wilk Type Tests for Multivariate Normality

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DOI: 10.4236/ojs.2014.411090    4,249 Downloads   6,075 Views  Citations

ABSTRACT

The Shapiro-Wilk test (SWT) for normality is well known for its competitive power against numerous one-dimensional alternatives. Several extensions of the SWT to multi-dimensions have also been proposed. This paper investigates the relative strength and rotational robustness of some SWT-based normality tests. In particular, the Royston’s H-test and the SWT-based test proposed by Villase?or-Alva and González-Estrada have R packages available for testing multivariate normality; thus they are user friendly but lack of rotational robustness compared to the test proposed by Fattorini. Numerical power comparison is provided for illustration along with some practical guidelines on the choice of these SWT-type tests in practice.

Share and Cite:

Lee, R. , Qian, M. and Shao, Y. (2014) On Rotational Robustness of Shapiro-Wilk Type Tests for Multivariate Normality. Open Journal of Statistics, 4, 964-969. doi: 10.4236/ojs.2014.411090.

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