Contact informationBack
| Date of survey | : | 14-19 January 2009 | |
| Survey method | : | Telephone survey with interviewers | |
| Target population | : | Local working population of age 18 to 65 with a monthly personal income no less than $8,000. | |
| Sampling method | : |
The contacts were successfully established with a target household, one target respondent was selected. If more than one subject had been available, selection was made using the "next birthday rule" which selected the person who had his/her birthday next from all those present.
|
|
| Sample size | : | 503 successful cases | |
| Overall Response rate | : | 75.4% | |
| Std. sampling error | : | Less than 4.5% |
| Table 1 Calculation of effective response rate |
|
| Table 2 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents』 ineligibility confirmed |
3,822 |
38.7% |
Fax/ data line |
409 |
4.1% |
Invalid number |
2,667 |
27.0% |
Call-forwarding/ mobile/ pager number |
48 |
0.5% |
Non-residential number |
309 |
3.1% |
Special technological difficulties |
19 |
0.2% |
No eligible respondents |
370 |
3.7% |
|
|
|
Respondents』 eligibility not confirmed |
2,621 |
26.5% |
Line busy |
155 |
1.6% |
No answer |
1,861 |
18.8% |
Answering device |
108 |
1.1% |
Call-blocking |
62 |
0.6% |
Language problem |
175 |
1.8% |
Interview terminated before the screening question |
242 |
2.4% |
Others |
18 |
0.2% |
|
|
|
Respondents』 eligibility confirmed, but failed to complete the interview |
2,933 |
29.7% |
Household-level refusal |
8 |
0.1% |
Known respondent refusal |
5 |
0.1% |
Appointment date beyond the end of the fieldwork period |
2,874 |
29.1% |
Partial interview |
9 |
0.1% |
Miscellaneous |
37 |
0.4% |
|
|
|
Successful cases |
503 |
5.1% |
|
|
|
Total |
9,879 |
100.0% |
