Table 7: Determination of the confidence intervals for quality controls.
|
Quality Control |
Equation for the confidence interval |
Mean |
t (0.01, DF = 5) |
SD |
Confidence interval (99%) |
|
NC |
mean (A405nm) + t (0.01, 5df) × SD |
0.063 |
3.365 |
0.0104 |
A405nm ≤ 0.098 |
|
LQC |
mean (LQC/NC) ± t (0.01, 5df) × SD |
3.980 |
4.032 |
0.4214 |
2.28 ≤ LQC/NC ≤ 5.68 |
|
HQC |
mean (HQC/NC) ± t (0.01, 5df) × SD |
13.80 |
4.032 |
1.6531 |
7.13 ≤ HQC/NC ≤ 20.5 |
NC: Negative control; LQC: Low positive quality control; HQC: High positive quality control.