Table 1. Quota of respondents
| Quota | Number of respondent s (%) | Quota | Number of respondents (%) |
| Region | Centrala | 31 ( 5.2) | Age | 20∼29 | 138 (23.0) |
| South-Eastb | 124 (20.7) | 30∼39 | 156 (26.0) |
| North-Eastc | 188 (31.3) | 40∼49 | 156 (26.0) |
| South-Westd | 186 (31.0) | 50∼59 | 150 (25.0) |
| North-Weste | 71 (11.8) | Gender | Male | 300 (50.0) |
| | Female | 300 (50.0) |
Jongno, Jung, Yongsan
Gangnam, Gangdong, Seocho, Songpa
Gangbuk, Gwangjin, Nowon, Dobong, Dongdaemun, Seongdong, Seongbuk, Jungnang
Gangseo, Gwanak, Guro, Geumcheon, Dangjak, Yangcheon, Yeongdeungpo
Mapo, Seodaemun, Eunpyeong