Contact informationBack
| Date of survey | : | 30 Aug – 1 Sep, 2011 | |
| Survey method | : | Telephone survey conducted by telephone interviewers | |
| Target population | : | Hong Kong female citizens aged 18 to 65 years who speaks Cantonese | |
| Sampling method | : | When telephone contact was 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 her birthday next from all those present. | |
| Sample size | : | 512 | |
| Effective Response rate | : | 72.4% | |
| Std. sampling error | : | Less than 2.2 percentage points (i.e., sampling error for percentages was less than plus/minus 4.4 percentage points at 95% confidence level) |
| Table 1 Calculation of response rate |
|
| Table 2 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents' ineligibility confirmed |
3,023 |
39.1% |
Fax/ data line |
297 |
3.8% |
Invalid number |
2,136 |
27.7% |
Call-forwarding/ mobile/ pager number |
58 |
0.8% |
Non-residential number |
241 |
3.1% |
Special technological difficulties |
16 |
0.2% |
No eligible respondents |
275 |
3.6% |
|
|
|
Respondents' eligibility not confirmed |
1,911 |
24.7% |
Line busy |
135 |
1.7 % |
No answer |
1,353 |
17.5% |
Answering device |
85 |
1.1% |
Call-blocking |
18 |
0.2% |
Language problem |
76 |
1.0% |
Interview terminated before the screening question |
233 |
3.0% |
Others |
11 |
0.1% |
|
|
|
Respondents' eligibility confirmed, but failed to complete the interview |
2,279 |
29.5% |
Household level refusal |
1 |
0.0% |
Known respondent refusal |
5 |
0.1% |
Appointment date beyond the end of the fieldwork period |
2,232 |
28.9% |
Partial interview |
34 |
0.4% |
Miscellaneous |
7 |
0.1% |
|
|
|
Successful cases |
512 |
6.6% |
|
|
|
Total |
7,725 |
100.0% |
