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Interlaboratory Comparisons in Water Bacteriology
Author(s) -
Greenberg Arnold E.,
Thomas June S.,
Lee Theodore W.,
Gaffey William R.
Publication year - 1967
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1967.tb03354.x
Subject(s) - sanitation , statistics , statistical hypothesis testing , sample (material) , environmental health , mathematics , medicine , pathology , chemistry , chromatography
The Sanitation and Radiation Laboratory of the California State Department of Public Health frequently has been requested to examine laboratories whose test results disagree. If a procedural review demonstrated no apparent deficiencies, further comparison of the laboratories has been made on the basis of a split‐sample study with relatively superficial statistical control. More recently, a useful statistical model for interlaboratory comparisons was developed and tested. This article describes the model and its application to the comparative evaluation of the performance of multiple tube dilution tests by three laboratories, one of whose results have been seriously questioned.