Contact Information返回
| Date of survey | : | 5 - 16 October 2009 | |
| 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.
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| Sample size | : | 1,000 successful cases | |
| Effective Response rate | : | 72.6% | |
| Std. sampling error | : | Less than 1.6% |
| Table 1 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents' ineligibility confirmed |
4,803 |
34.4% |
Fax/ data line |
402 |
2.9% |
Invalid number |
3,313 |
23.7% |
Call-forwarding/ mobile/ pager number |
83 |
0.6% |
Non-residential number |
312 |
2.2% |
Special technological difficulties |
32 |
0.2% |
No eligible respondents |
661 |
4.7% |
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|
|
Respondents' eligibility not confirmed |
3,418 |
24.5% |
Line busy |
222 |
1.6% |
No answer |
2,412 |
17.3% |
Answering device |
55 |
0.4% |
Call-blocking |
38 |
0.3% |
Language problem |
171 |
1.2% |
Interview terminated before the screening question |
510 |
3.6% |
Others |
10 |
0.1% |
|
|
|
Respondents' eligibility confirmed, but failed to complete the interview |
4,755 |
34.0% |
Household-level refusal |
25 |
0.2% |
Known respondent refusal |
12 |
0.1% |
Appointment date beyond the end of the fieldwork period |
4,496 |
32.2% |
Partial interview |
26 |
0.2% |
Miscellaneous |
196 |
1.4% |
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|
|
Successful cases |
1,000 |
7.2% |
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|
|
Total |
13,976 |
100.0% |
| Table 2 Calculation of effective response rate |
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