Estimate the precision of the measurement procedure at a single site.
The worksheet opens showing 4 columns. The Sample column identifies the levels of the analyte in the sample (1 level). Day identifies the day number (20 days), Run identifies the run within each day (2 runs per day). Glucose (mg/dL) identifies the measured value for 2 replicates of sample in each run.
The analysis report opens.
The variability plots show a simple visual assessment of the closeness of agreement between the measured quantity values. The purple lines show the mean of each run, the light blue lines show the mean of each day, and the dark blue line the overall grand mean.
The abbreviated variance components table shows the required precision statistics expressed numerically as the standard deviation (SD) and coefficient of variation (CV).
The detailed variance components table show the precision expressed numerically as the chosen measure of imprecision along with a confidence interval for each component.