Diagnostics and plots for identifying collinearity-influential observations and for classifying multivariate outliers
Date
2000
Authors
Van Vuuren J.O.
Conradie W.J.
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Abstract
Simple, but very effective measures and plots are proposed to detect collinearity-influential observations in multiple linear regression analysis. Unlike traditional methods that are based mostly on the eigenstructure of the regressor matrix, these methods are based solely on the general tools of regression diagnostics, namely residuals and leverage values. They lead to a better understanding of influential observations and their effect on multivariate dispersion.
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Citation
South African Statistical Journal
34
2
34
2