Table 5

Method precision for bupivacaine hydrochloride and fentanyl citrate

Bupivacaine hydrochloride
 Average6.2635
 Variance: s21.89×10–3
 SD: s0.04354
 Relative SD: Sy0.00695
 Coefficient of variation: Wz0.70%
Fentanyl citrate
 Average0.1666
 Variance: s28.63×10–6
 SD: s0.00294
 Relative SD: Sy0.01763
 Coefficient of variation: Wz1.76%