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ERIC Number: ED418095
Record Type: Non-Journal
Publication Date: 1998-Apr-11
Pages: 67
Abstractor: N/A
Reference Count: N/A
ISBN: N/A
ISSN: N/A
Ways To Evaluate the Assumption of Multivariate Normality.
Ashcraft, Alyce S.
This paper reviews graphical and nongraphical methods for estimating multivariate normality. Prior to exploring this methodology, a foundation is established by presenting ways to assess univariate and bivariate normality. A data set of three variables used by J. Stevens (1986) is analyzed using Q-Q plots, stem and leaf plots, histograms, skewness, and kurtosis coefficients, the Shapiro-Wilk statistic, and bivariate and multivariate scatterplots. Multivariate normality is explored in terms of calculating Mahalanobis distances and plotting them on a scattergram against derived chi-square values using Fortran and Statistical Package for the Social Sciences (SPSS) programs developed by B. Thompson (1990, 1997). Appendixes, which comprise more than half the half, contain the SPSS commands, two computer programs for the analysis, and some results of the analyses. (Contains 24 figures and 11 references.) (Author/SLD)
Publication Type: Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A