Quality and Analysis of Small Data Sets – A Statistical Point of View

  • Ersbøll AK
  • Ersbøll BK
Open Access
Oral presentation


Public Health Treatment Effect Data Quality Statistical Point Veterinary Medicine 
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We are often dealing with veterinary studies with very limited number of experimental units e.g. few animals. This might be due to complicated experiments, high cost for each animal, time demanding experiments, etc.

All other things being equal, when the data set is small, it is difficult to demonstrate significant treatment effects. It is therefore of interest to improve the quality of data in order to demonstrate significant effects. On the other hand the choice of experimental design is also very important. Furthermore, the choice of analytical methods might also have some influence on whether or not an effect can be seen.

Examples of small data sets will be given, illustrating the effect of high data quality. Different experimental designs will be discussed and the influence will be illustrated. Choosing exact methods for the statistical analysis, evaluating outliers or strange observations by influential statistics may improve the result as well.

Copyright information

© The Author(s); licensee BioMed Central Ltd. 2003

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Authors and Affiliations

  • Ersbøll AK
    • 1
  • Ersbøll BK
    • 2
  1. 1.The Royal Veterinary and Agricultural UniversityDenmark
  2. 2.The Technical University of DenmarkDenmark

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