"People don’t need statistics; they need to know how to solve their problems. All that’s needed is a few simple tools and a working knowledge of variation to be able to distinguish between common and special causes. Only 1–2 percent of people need advanced statistical knowledge... 'Prediction is the problem, whether we are talking about applied science, research and development, engineering, or management in industry, education, or government,' [Deming] says. 'The question is, 'What do the data tell us? How do they help us to predict?'"
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