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Today

• Concerns about numerical accuracy of statistical software are greater now than ever before
  
  
  
  • Proliferation of Statistical Software
    
    
    • Commercial packages (20 -> 300+)
      
      
    • Availability in nonstatistical package, e.g., spreadsheets
      
      
    • Homegrown
      
      
      
  • Often developed by nonstatisticians
    
    
    
  • Many more, less statistically-skilled users