Percentages: The most useful statistics ever invented
Several years ago, Mosteller, Youtz, and Zahn (1967) determined that the probability (see Chapter 3) of rounded percentages adding exactly to 100 is perfect for two categories, approximately 3/4 for three categories, approximately 2/3 for four categories, and approximately √6/cπ for c ≥5, where c is the number of categories and π is the ... ................
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