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I work for a large chemical company as "Methods Editor": I cooperate within a team to manage and facilitate the company's analytical and test methods process. I provide coaching, method documentation skills, and statistical expertise to insure that methods will produce valid results for the intended application. |
I work for a large chemical company as "Methods Editor": I cooperate within a team to manage and facilitate the company's analytical and test methods process. I provide coaching, method documentation skills, and statistical expertise to insure that methods will produce valid results for the intended application. |
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Being a Methods Editor, I frequently evaluate variance data according to ISO Standard 5725 <ref>ISO Standard 5725-2:1994, Accuracy (trueness and precision) of Measurement Methods and Results – Part 2: Basic Method for the Determination of Repeatability and Reproducibility of a Standard Measurement Method, International Organization for Standardization, Geneva, Switzerland, 1994.</ref>. ISO 5725 refers to Cochran's C test <ref>W.G. Cochran, Ann. Eugen. (London) '''11''', 47–52 (1941).</ref> for verifying if three or more variance estimates are mutually consistent. The C test is |
Being a Methods Editor, I frequently evaluate variance data according to ISO Standard 5725 <ref>ISO Standard 5725-2:1994, Accuracy (trueness and precision) of Measurement Methods and Results – Part 2: Basic Method for the Determination of Repeatability and Reproducibility of a Standard Measurement Method, International Organization for Standardization, Geneva, Switzerland, 1994.</ref>. ISO 5725 refers to [[Cochran's C test]] <ref>W.G. Cochran, Ann. Eugen. (London) '''11''', 47–52 (1941).</ref> for verifying if three or more variance estimates are mutually consistent. The C test is mentioned in many text books, but a dedicated article in Wikipedia was lacking. As I had published <ref>R.U.E. 't Lam, Analytica Chimica Acta '''659''', 68–84 (2010).</ref> <ref>[http://rtlam.blogspot.com/ Blog: ''Variance Outlier Test'']</ref> a generalized version of the C test, I felt in a good position to initiate a short article on the C test in Wikipedia. |
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Article: [[Cochran's C test]] |
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[[http://en.wikipedia.org/wiki/User:Rtlam/Draft_Article| DraftArticle]] |
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*Wikipedia [http://stats.grok.se/ article traffic statistics] |
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Latest revision as of 07:38, 2 October 2011
I work for a large chemical company as "Methods Editor": I cooperate within a team to manage and facilitate the company's analytical and test methods process. I provide coaching, method documentation skills, and statistical expertise to insure that methods will produce valid results for the intended application.
Being a Methods Editor, I frequently evaluate variance data according to ISO Standard 5725 [1]. ISO 5725 refers to Cochran's C test [2] for verifying if three or more variance estimates are mutually consistent. The C test is mentioned in many text books, but a dedicated article in Wikipedia was lacking. As I had published [3] [4] a generalized version of the C test, I felt in a good position to initiate a short article on the C test in Wikipedia.
- ^ ISO Standard 5725-2:1994, Accuracy (trueness and precision) of Measurement Methods and Results – Part 2: Basic Method for the Determination of Repeatability and Reproducibility of a Standard Measurement Method, International Organization for Standardization, Geneva, Switzerland, 1994.
- ^ W.G. Cochran, Ann. Eugen. (London) 11, 47–52 (1941).
- ^ R.U.E. 't Lam, Analytica Chimica Acta 659, 68–84 (2010).
- ^ Blog: Variance Outlier Test
Article: Cochran's C test
- Wikipedia article traffic statistics