Table 7:
Results of HPLC Assays (mg of oxytocin per vial)
| Sample No | Lab 1 | Lab 2 | Lab 8 | Lab 11 | Lab 12 | Lab 13 | Lab 14 |
|---|---|---|---|---|---|---|---|
| 1 | 1.829 | 1.851 | 1.777 | 1.801 | 1.825 | 1.720 | 1.822 |
| 2 | 1.808 | 1.861 | 1.785 | 1.822 | 1.816 | 1.740 | 1.830 |
| 3 | 1.819 | 1.852 | 1.777 | 1.815 | 1.815 | 1.706 | 1.806 |
| 4 | 1.818 | 1.910 | 1.793 | 1.798 | 1.815 | 1.734 | 1.829 |
| 5 | 1.827 | 1.861 | 1.781 | 1.819 | 1.845 | 1.726 | 1.827 |
| 6 | 1.830 | 1.857 | 1.786 | 1.823 | 1.823 | 1.737 | 1.820 |
| 7 | 1.816 | 1.843 | 1.787 | 1.819 | 1.818 | 1.721 | 1.820 |
| 8 | 1.810 | 1.859 | 1.785 | 1.822 | 1.794 | 1.747 | 1.822 |
Statistical analysis indicated that the result of 1.910 mg by Lab 2 was an outlier. With this exclusion, the sample mean was 1.806. The lab-to-lab variance (reproducibility) and the sample-to-sample variance within each lab (repeatability) are summarized in Table 8.