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Hays' book separates science from lay behavioral theories,
Rezension bezieht sich auf: Statistics (Gebundene Ausgabe)
People in the behavioral area tend to have a lot to say about human behavior - seldom with proof what they say in terms of statistics, graphs and figures. Even if they do so (showing facts), you can - whilst asking how these "facts" have been gathered - get answers like "they stem from research" or "they are gathered by professionals". Hays book shows the reader how to do it and how to investigate concepts as "more than", "less than" and "differencies" - rinsed from guessing, prejudices and other political agendas. Or, in another words, separating science from lay theories. Of course this is not done without hard work and creative thinking, both is however needed to get the grasp of Statistics.