title: Diagnostic data evaluation. Part III. Collaborative study evaluation: standard deviation considered to be a constant.
abstract: The diagnostic evaluation of the crude protein collaborative study identified possible problems with a standardized interval for the Kjeldahl digestion, with sample preparation, and with excess sample weights. The standard deviations for the ham and the beef samples cannot be considered to be representative of the method because of these problems. The standard deviations for the frankfurter and the pork sausage samples for all analysts met the performance standard of 0.24. There was no evidence of analyst bias.
authors.affiliation: U.S. Department of Agriculture, Food Safety and Inspection Service, Washington, DC 20250.
authors.forename: A J
authors.initials: AJ
authors.lastname: Malanoski
mesh_terms: D000818:Animals; D002417:Cattle; D004044:Dietary Proteins / Q000032:analysis*; D005069:Evaluation Studies as Topic; D008460:Meat / Q000032:analysis; D012015:Reference Standards; D013223:Statistics as Topic; D013552:Swine
chemical_list: D004044:Dietary Proteins