Table II.
Probability that a Sample of n FFRs Will Result in a Specific Number of Failures when the True Number of Defective Units in the Lot is 10%, 5%, and 2.5%
| Sample Size | Number of Failures | Probability (in %) for a lot with 10% Defective Units | Probability (in %) for a lot with 5% Defective Units | Probability (in %) for a lot with 2.5% Defective Units |
|---|---|---|---|---|
| 10 | 0 | 34.9 | 59.9 | 77.6 |
| 1 | 38.7 | 31.5 | 19.9 | |
| 2 | 19.4 | 7.5 | 2.3 | |
| 3 | 5.7 | 1.0 | - | |
| 4 | 1.1 | 0.1 | - | |
| 5 | 0.1 | - | - | |
| 6 | - | - | - | |
| 18 | 0 | 15.0 | 39.7 | 63.4 |
| 1 | 30.0 | 37.6 | 29.3 | |
| 2 | 28.4 | 16.8 | 6.4 | |
| 3 | 16.8 | 4.7 | 0.9 | |
| 4 | 7.0 | 0.9 | 0.1 | |
| 5 | 2.2 | - | - | |
| 6 | 0.5 | - | - | |
| 7 | 0.1 | - | - | |
| 8 | - | - | - | |
| 9 | - | - | - | |
| 24 | 0 | 8.0 | 29.2 | 54.5 |
| 1 | 21.3 | 36.9 | 33.5 | |
| 2 | 27.2 | 22.3 | 9.9 | |
| 3 | 22.1 | 8.6 | 1.9 | |
| 4 | 12.9 | 2.4 | 0.3 | |
| D | 5.7 | 0.5 | - | |
| 6 | 2.0 | 0.1 | - | |
| 7 | 0.6 | - | - | |
| 8 | 0.1 | - | - | |
| 9 | - | - | - | |
| 10 | - | - | - | |
| 40 | 0 | 1.5 | 12.9 | 36.3 |
| 1 | 6.6 | 27.1 | 37.3 | |
| 2 | 14.2 | 27.8 | 18.6 | |
| 3 | 20.0 | 18.5 | 6.0 | |
| 4 | 20.6 | 9.0 | 1.4 | |
| 5 | 16.5 | 3.4 | 0.3 | |
| 6 | 10.7 | 1.0 | - | |
| 7 | 5.8 | 0.3 | - | |
| 8 | 2.6 | 0.1 | - | |
| 9 | 1.0 | - | - | |
| 10 | 0.4 | - | - | |
| 11 | 0.1 | - | - | |
| 12 | - | - | - |
[source: based on calculations from Yorio et al. (2019)]