A classroom exercise in sampling technique

• Michael R. Ross ^[3] ; Daniel W. Bacon ^[1] ; Wayne C. Wolsey ^[2]
  1. [1] Kutztown University

     Kutztown University

     Borough of Kutztown, Estados Unidos

     
  2. [2] Macalester College

     Macalester College

     City of Saint Paul, Estados Unidos

     
  3. [3] Department of Chemistry, St. John''s University

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• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 77, Nº 8 (August), 2000, págs. 1015-1015
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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 MandM candies for the sample size and NERDS for the non-homogeneous sample exercises. Results from the past four years are given.