title: Critical evaluation of the logit-log plot for the radio assay of vitamin B12.
abstract: The dose-response calculation for radio assay of vitamin B12 is carried out using a straight line and a third degree curve to fit the experimentally obtained calibration points. It is shown that high dispersion of the calibration points with respect to the regression line can lead to errors in the calculation of the response. The calculation of the mean dispersion sx with respect to the regression line turns out to be a good criterion for checking the accuracy of the results.
mesh_terms: D005069:Evaluation Studies as Topic; D006801:Humans; D007553:Isotope Labeling / Q000379:methods; D012044:Regression Analysis; D013223:Statistics as Topic; D014805:Vitamin B 12 / Q000032:analysis*
chemical_list: D014805:Vitamin B 12