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Table 1
Estimated optimal sample size and estimated survey costs for 5%, 10% and 20% level of precision with StRS and GRTS. Optimal sample size is computed for each stratum separately, values for the two survey designs are then compared with paired Wilcoxon test.
| Precision | Wilcoxon tests | Overall sample sizes | Survey costs (×1000€) | |||
|---|---|---|---|---|---|---|
| Test statistic (V) | P-value | Actually = 525 | Actually = 53 | |||
| StRS | GRTS | StRS | GRTS | |||
| 5% | 0 | <0.001 | 955 | 481 | 76 | 38 |
| 10% | 0 | <0.001 | 493 | 281 | 39 | 22 |
| 20% | 0 | <0.001 | 248 | 167 | 20 | 13 |
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