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Background

• Numerical accuracy of statistical software has been a concern for many years
  
  
  
  • Longley (1967), "An Appraisal of Least Squares Programs for the Electronic Computer from the Viewpoint of the User", JASA, 62, pp. 819-841.
    
    
  • Wampler (1970), "A report on the accuracy of some widely used least squares computer programs", JASA, 65, pp. 549-565.
    
    
  • Francis, Heiberger, and Velleman (1975) "Criteria and considerations in the evaluation of statistical program packages", American Statistician, 29, pp. 52-55.
    
    
  • Gentle (1982) "Testing and evaluation of statistical software", Evaluating Mathematical Programming Techniques, pp. 248-257.
    
    
  • Eddy and Cox (1991), "The quality of statistical software: Controversy in the statistical software industry", Chance, 4, pp. 12-18.