Table 4:
Source | Variance | Standard deviation (SD) | Relative standard deviation (%RSD) |
---|---|---|---|
Reproducibility (lab to lab) | 0.0072 | 0.0851 | 4.73% |
Repeatability (sample to sample) | 0.0011 | 0.0332 | 1.85% |
The mean for all six labs was 1.798 mg with 95% confidence interval: 1.707 mg to 1.888 mg. None of the labs’ results were excluded.