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A QC program requires documentation of control results and regular assessment of data. The following pages provide an overview of some of the ways to document and assess QC results. To begin, we will define basic terms used in statistical analysis of data.

  • The mean is simply an average of data points.
  • Let's say that 100 glucose determinations are performed on a known control sample.
  • If we add all the results together, then divide by the number of results, we get the mean.
  • Significant variations in the mean from day to day may indicate systematic errors.