PROTOTYPE OF A COMPUTERIZED SYSTEM TO AUTOMATICALLY ACQUIRE, STATISTICALLY TEST AND SUPPLY THE PARAMETERS NEEDED (STANDARD DEVIATION AND PERCENT RECOVERY--OBTAINED BY RUNNING CONTROL SAMPLES) TO COMPUTE 95 CONFIDENCE INTERVALS FOR CHEMICAL (AND OTHER) MEASUREMENTS CONTAINED IN AN ORGANIZATIONS'S MAIN DATABASE (OR LOCALLY) AND ULTIMATELY TO UNBIAS THOSE

摘要

A prototype of a computerized system (which also could be operated from aninternet website)has been developed to automatically acquire, statistically test and supply theparameters needed(standard deviation and percent recovery--obtained by running control samples)to compute95% confidence intervals for chemical (and other) measurements contained in anorganizations'smain database and ultimately to unbias those measurements and their confidenceintervals. Allsources of stochastic variation within the analytical methods arecharacterized, adjusted andcorrected so as to provide parameters that are truly representative of thestochastic processesoccurring in them as they are being done in a particular laboratory. This isdone by runningchemical, biological, microbiological or radiological control samples onspecially designedcomputer forms that automatically test the data statistically as it is beingaccumulated. Theseforms and their control samples are often suitable to be continued to be runfor quality assurancepurposes.