title: [Statistical calculation from pH-values (author's transl)].
abstract: In all cases, statistical parameters of a H+-activities ought to be evaluated from data of pH values. Owing to the fact that the lower range of variability of the concentratons of H-ions is limited by zero, the values ought to be transformed into a logarithmic scale. In order to facilitate comprehension, the handling of transformations for the statistical evaluation of random samples is first explained by the example of the tidal volume of newborns and infants. In the second part of the paper, statistical parameters of several significant random samples of pH data are computed from various transformation systems and are contrasted in order to allow comparisons. Thus it becomes apparent that, under certain circumstances, the method of computing mean and standard deviations from a H+-activities may result in a characterization of random samples that are implausible.
mesh_terms: D000136:Acid-Base Equilibrium / Q000187:drug effects; D000328:Adult; D000768:Anesthesia, General; D006348:Cardiac Surgical Procedures; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007231:Infant, Newborn; D013223:Statistics as Topic; D013514:Surgical Procedures, Operative; D013990:Tidal Volume
vernacular_title: Die Berechnung statistischer Masszahlen aus pH-Werten.