Table 2.
Definition and descriptive statistics of the demographic variables.
| Variable | Description | Sample Mean a | Population Mean b |
|---|---|---|---|
| Gender | 0 = male; 1 = female. | 0.500 (0.500) | 0.499 |
| Age | 0 = young people (18–44); 1 = middle-aged or senior people (≥45). | 0.254 (0.435) | |
| Education attainment |
0 = senior high school or below; 1 = professional school, college degree or above. | 0.632 (0.483) | 0.401 |
| Occupation | Whether your work is related to biotechnology? (0 = no; 1 = yes) | 0.079 (0.271) | |
| Child | Whether your family has minors (≤15)? (0 = no; 1 = yes) | 0.435 (0.496) | |
| Income | Monthly household disposable income (1 = RMB RMB 2001–4000; 3 = RMB 4001–6000; 4 = RMB 6001–8000; 5 = RMB 8001–10,000; 6 = RMB 10,001–12,000; 7 = RMB 12,000 or above) | 3.398 (1.537) |
a Standard deviation in the parentheses. b The population includes urban and rural residents based on information of 31 provinces from “2017 China Statistical Yearbook”. b RMB 6.80 = USD 1.