| 组别/数据 Group/Data |
| 5%明矾 5% alum | 平均值 Average | 10%明矾 10% alum | 平均值 Average | 15%明矾 15% alum | 平均值 Average | ||||||
| 对照组 Control group |
| ① | ② | ③ |
| ① | ② | ③ |
| ① | ② | ③ |
|
| 1 h | 60 | 50 | 50 | 53.333 | 70 | 50 | 55 | 60.000 | 60 | 75 | 60 | 65.000 | |
| 2 h | 50 | 50 | 50 | 50.000 | 65 | 70 | 50 | 61.667 | 50 | 75 | 65 | 63.333 | |
| 3 h | 60 | 70 | 50 | 60.000 | 55 | 65 | 50 | 56.667 | 75 | 65 | 60 | 66.667 | |
| 实验组 Experience group | 1 h | 60 | 60 | 75 | 65.000 | 65 | 70 | 60 | 65.000 | 30 | 50 | 60 | 46.667 |
| 2 h | 75 | 70 | 80 | 75.000 | 90 | 85 | 80 | 85.000 | 80 | 65 | 75 | 73.333 | |
| 3 h | 50 | 55 | 65 | 56.667 | 40 | 60 | 55 | 51.667 | 60 | 75 | 80 | 51.667 | |