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Re-inspection results of machine using qualified products by workers.
| X | Y | Z (%) |
|---|---|---|
| 14 980 | 69 | 0.46 |
| 15 240 | 71 | 0.47 |
| 14 928 | 77 | 0.52 |
| 15 120 | 73 | 0.48 |
Here, X: overall number of injections inspected by proficient workers; Y: rejected number judging by inspection machine and re-confirmed by workers; Z: omission error rates of workers.
