Limits of tolerance and z-scores in ring tests

  • S. Uhlig
  • P. Henschel


 A series of objections are discussed to the use of symmetrical tolerance intervals in ring tests as part of a procedure for laboratory assessment. Instead, a modified, asymmetrical tolerance interval is introduced which takes these objections into consideration. A modified z-score is proposed corresponding to the modified tolerance interval.


Laboratory Assessment Tolerance Interval Ring Test Asymmetrical Tolerance Symmetrical Tolerance 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • S. Uhlig
    • 1
  • P. Henschel
    • 2
  1. 1.Freie Universität Berlin, Garystrasse 21, D-14195 Berlin, GermanyDE
  2. 2.Umweltbundesamt, Bismarckplatz 1, D-14193 Berlin, GermanyDE

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