ROBSCALE: RATS module to compute robust alternative to standard deviation

Eric Blankmeyer ()
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Eric Blankmeyer: Texas State University

Statistical Software Components from Boston College Department of Economics

Abstract: robscale.src computes a robust alternative to the standard deviation as a measure of scale (dispersion). The standard deviation is easily distorted by outliers and may therefore be quite misleading. robscale.src computes the Qn statistic of Rousseeuuw and Croux, which is very robust and also has good efficiency (relative to the standard deviation) when the data are in fact uncontaminated Gaussian random variables. (P. J. Rousseeuw and C. Croux, "Alternatives to the median absolute deviation," Journal of the American Statistical Association, Dec 1993, vol. 88, no. 424, pp. 1273-1283). Specifically, if the series x contains n observations, then there are n(n-1)/2 differences of the form abs( x(i)-x(j) ), i

Language: RATS
Keywords: robust; estimation (search for similar items in EconPapers)
Date: 1999-03-25
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http://fmwww.bc.edu/repec/bocode/r/robscale.src program code (text/plain)

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