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Determination of sample size.
| Administrative divisions | 2006 population | 2020 population (projected) | Proportion of sample size (%) | No. of distributed questionnaires |
|---|---|---|---|---|
| Umuororonjo | 70,000 | 100,000 | 14 | 59 |
| Amawom | 150,000 | 197,900 | 27 | 114 |
| Umuonyeche | 101,000 | 160,000 | 23 | 97 |
| Umuodu | 80,000 | 110,000 | 16 | 68 |
| Umuoyema | 100,000 | 140,000 | 20 | 84 |
| Total | 501,000 | 707,900 | 100 | 422 |
