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Sulfur in coal seams

A study was made to compare the sulfur content of the five major coal (labeled S1 to S5, respectively) seams in a particular region.

Variables.

  1. SULFUR: Sulfur content
  2. SEAM: Coal seam label

Source. Milton, J.S. and Arnold, J.C. (1995). Introduction to probability and statistics, McGraw Hill International Editions.


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