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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > August  >
In the Classroom
Tested Demonstrations
A Classroom Exercise in Sampling Technique
Michael R. Ross
Department of Chemistry, College of Saint Benedict/St. John's University, St. Joseph, MN 56374

checked by: Daniel W. Bacon
Department of Chemistry, Kutztown University, Kutztown, PA 19530

checked by: Wayne C. Wolsey
Department of Chemistry, Macalester College, St. Paul, MN 55105-1899

Cover
August 2000
Vol. 77 No. 8
p. 1015
Abstract
Teaching about sampling problems leads to a very theoretical understanding of the difficulties encountered when selecting a representative sample. A classroom hands-on demonstration has been developed that looks at the two important sampling considerations, sample size and non-homogeneous sample materials. This classroom activity makes use of readily available M&M candies for the sample size and NERDS for the non-homogeneous sample exercises. Results from the past four years are given.
More Information
*  Citation
 Ross, Michael R. J. Chem. Educ. 2000 77 1015.
*  Keywords
 Analytical Chemistry; Demonstrations; Problem-Based Learning; Laboratory Instruction; Quantitative Analysis; Statistics/Data Analysis; Teaching/Learning Aids
*  History
 Created:
Last Updated:		 July 5, 2000
April 15, 2005
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