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st: A comparative study of statistical software
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Off topic but someone may find it interesting (Stata 8.1 is one of the packages used)
Kellie B. Keeling and Robert J. Pavur, A comparative study of the reliability of nine statistical software packages,
Computational Statistics & Data Analysis, Volume 51, Issue 8, 1 May 2007, Pages 3811-3831.
(http://www.sciencedirect.com/science/article/B6V8V-4JHMGWJ-1/2/77a29a95c2071997f13fcca7267711d1)
Abstract: The reliabilities of nine software packages commonly used in performing statistical analysis are assessed and
compared. The (American) National Institute of Standards and Technology (NIST) data sets are used to evaluate the
performance of these software packages with regard to univariate summary statistics, one-way ANOVA, linear regression,
and nonlinear regression. Previous research has examined various versions of these software packages using the NIST data
sets, but typically with fewer software packages than used in this study. This study provides insight into a relative
comparison of a wide variety of software packages including two free statistical software packages, basic and advanced
statistical software packages, and the popular Excel package. Substantive improvements from previous software
reliability assessments are noted. Plots of principal components of a measure of the correct number of significant
digits reveal how these packages tend to cluster for ANOVA and nonlinear regression.
Keywords: Numerical accuracy; Software testing; Statistical reference data sets (StRD)
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