Intra-day Accuracy and Precision

  • Accuracy and precision should be calculated using the mean concentration results of the QC samples at each level. Precision should be based on the percent coefficient of variation (%CV) observed by the mean at each quality control concentration level.
  • Dixon test for the outliers: Dixon test is applied to the percent accuracy determined for the QCs based on the theoretical and measured concentrations of the QCs from the standard curve.
  • Outliers may be omitted from the precision and accuracy calculation after performing the Dixon test.