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Table 2.
Numbers and percentages (and their standard errors) of galaxies with different types of rings in poor (3 ≤ Nrich ≤ 10), rich (11 ≤ Nrich ≤ 50), and all groups.
| Poor groups |
Rich groups |
All groups |
||||
|---|---|---|---|---|---|---|
| Ring type | Number | Percentage | Number | Percentage | Number | Percentage |
| Inner ring | 225 | 46.20 ± 0.68% | 74 | 49.33 ± 0.70% | 299 | 46.94 ± 0.68% |
| Outer ring | 45 | 9.24 ± 0.30% | 25 | 16.67 ± 0.41% | 70 | 10.99 ± 0.33% |
| I+O rings | 86 | 17.66 ± 0.42% | 22 | 14.67 ± 0.38% | 108 | 16.95 ± 0.41% |
| Nuclear ring | 34 | 6.98 ± 0.26% | 8 | 5.33 ± 0.23% | 42 | 6.59 ± 0.26% |
| Partial ring | 97 | 19.92 ± 0.45% | 21 | 14.00 ± 0.37% | 118 | 18.52 ± 0.43% |
| Total | 487 | 100% | 150 | 100% | 637 | 100% |
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