Representative sample of the household survey
| Urban quarter | No of private households in the quarter (N) | Minimum required returns (n) | No of necessary distributed questionnaires (if 12% response rate) |
| Am Ring | 5456 | 359 | 2991 |
| Gundeldingen | 10 085 | 370 | 3084 |
| Bruderholz | 4038 | 351 | 2924 |
| Bachletten | 6710 | 363 | 3028 |
| Gotthelf | 3764 | 349 | 2906 |
| Iselin | 8860 | 368 | 3069 |
| St. Johann | 9180 | 369 | 3073 |
| Matthäus | 8012 | 367 | 3055 |
| Klybeck | 3506 | 346 | 2886 |
| Kleinhüningen* | 1291 | 296 | 2469 |
| Total of 10 urban district | 60 902 | 3538 | 29 485 |
*The necessary number of questionnaires was calculated with an expected response rate of 12% and, due to statistical calculations, this means more households should have received a questionnaire than there actually are in Kleinhüningen. Source: Population Statistics 2014, Canton Basel-City.