Contact information返回
| Date of survey | : | 1 - 14 November 3, 2007 | |
| Survey method | : | Telephone survey with interviewers | |
| Target population | : | Hong Kong citizens of age 18 or above. | |
| Sampling method | : | All data were collected by our interviewers using a Computer Assisted Telephone Interview (CATI) system which allowed real-time data capture and consolidation. To ensure data quality, on top of on-site supervision, voice recording, screen capturing and camera surveillance were used to monitor the interviewers' performance. |
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| Sample size | : | 1010 successful cases | |
| Overall Response rate | : | 67.7% | |
| Std. sampling error | : | Less than 1.6% |
| Table 1 Breakdown of contact information of the survey |
| Respondents' ineligibility confirmed | 3,406 | 39.0% |
| Fax/ data line | 424 | 4.9% |
| Invalid number | 2,473 | 28.3% |
| Call-forwarding/ mobile/ pager number | 42 | 0.5% |
| Non-residential number | 340 | 3.9% |
| Special technological difficulties | 80 | 0.9% |
| No eligible respondents | 47 | 0.5% |
| Respondents' eligibility not confirmed | 2,455 | 28.1% |
| Line busy | 184 | 2.1% |
| No answer | 1,587 | 18.2% |
| Answering device | 45 | 0.5% |
| Call-blocking | 30 | 0.3% |
| Language problem | 133 | 1.5% |
| Interview terminated before the screening question | 455 | 5.2% |
| Others | 21 | 0.2% |
| Respondents' eligibility confirmed, but failed to complete the interview | 1,853 | 21.2% |
| Household-level refusal | 0 | 0.0% |
| Known respondent refusal | 5 | 0.1% |
| Appointment date beyond the end of the fieldwork period | 1,772 | 20.3% |
| Partial interview | 24 | 0.3% |
| Miscellaneous | 52 | 0.6% |
| Successful cases | 1,010 | 11.6% |
| Total | 8,724 | 100.0% |
| Table 2 Calculation of response rate |
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^ Including "company-level refusal" and "known respondent refusal"
