The comments on the one-tailed test are correct. The reason for the higher percentage
changes that they illustrate with the one-sided tests is that the false positives on the opposite …

During the lifetime of the Association of Clinical Biochemists the instruments used in routine
clinical chemistry have developed from virtually nothing to the point where laboratories are …

Four reference laboratories were selected each using AutoAnalyzer (Technicon Instruments
Co., Chertsey, Surrey) methods for all four constituents. Ampoules of solution E were stored …

The CVs of the enzymatic methods are considerably higher (CV 1.2%; 0.7-1.5%; C” T 1.3-
2.0%), and the CV values are affected by both CV and CIT0 contributions. In addition, the …

This issue of Clinical Chemistry and Laboratory Medicine features a study of the
interchangeability of results among point of care and core laboratory analyzers for a number …

The precision of replicate analyses for alkaline phosphataseactivity measured on a survey
reference sample was extremely poor. The reference sample's enzyme itself became …

A great deal of energy and effort has been expended by the Standards Committee of the
American Association of Clinical Chemists in defining standards for clinical analyses. The …

Biomedical, Newton, MA) ion-selective electrode type of analyzer relative to that obtained
with flame photometry. They were concerned because their results were in disagreement …

A recent editorial by Barnett'stated:'There is no evidence that patients or physicians are
harmed by our present techniques as long as the techniques meet existing standards'. While …

ANY PEOPLE TODAY think of statistics as a form of mathematical manipulation to be
performed on numerical data. A smaller group looks upon the technics of experimental …