Contact InformationBack
| Date of survey | : | 19-30 September 2011 | |
| Survey method | : | Telephone survey with interviewers | |
| Target population | : | Hong Kong working population 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. | |
| Sample size | : | 502 successful cases | |
| Effective Response rate | : | 78.7% | |
| Std. sampling error | : | Less than 2.2% |
| Table 1 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents' ineligibility confirmed |
5,866 |
39.4% |
Fax/ data line |
416 |
2.8% |
Invalid number |
4,344 |
29.2% |
Call-forwarding/ mobile/ pager number |
80 |
0.5% |
Non-residential number |
250 |
1.7% |
Special technological difficulties |
80 |
0.5% |
No eligible respondents |
696 |
4.7% |
|
|
|
Respondents' eligibility not confirmed |
4,203 |
28.2% |
Line busy |
421 |
2.8% |
No answer |
3,166 |
21.3% |
Answering device |
180 |
1.2% |
Call-blocking |
56 |
0.4% |
Language problem |
123 |
0.8% |
Interview terminated before the screening question |
252 |
1.7% |
Others |
5 |
0.0% |
|
|
|
Respondents' eligibility confirmed, but failed to complete the interview |
4,320 |
29.0% |
Household-level refusal |
6 |
0.0% |
Known respondent refusal |
1 |
0.0% |
Appointment date beyond the end of the fieldwork period |
4,287 |
28.8% |
Partial interview |
20 |
0.1% |
Miscellaneous |
6 |
0.0% |
|
|
|
Successful cases |
502 |
3.4% |
|
|
|
Total |
14,891 |
100.0% |
| Table 2 Calculation of effective response rate |
|
