抽检数量n/个 | 20 | 50 | 100 | 200 | 500 | 1000 | 2000 | 5000 | 10000 |
合格数量m/个 | 19 | 46 | 93 | 185 | 459 | 922 | 1840 | 4595 | 9213 |
口罩合格率 | 0.950 | 0.920 | 0.930 | 0.925 | 0.918 | 0.922 | 0.920 | 0.919 | 0.921 |
下面四个推断合理的是( )