| Label | Id | |
|---|---|---|
| household survey | PROC:AOD | |
| organization as study subject | PROC:AOD | |
| program as study subject | PROC:AOD | |
| study design, planning, execution, and result | PROC:AOD | |
| statistical study design | PROC:AOD | |
| factorial design | PROC:AOD | |
| controlled study | PROC:AOD | |
| uncontrolled study | PROC:AOD | |
| blind and open study | PROC:AOD | |
| study execution | PROC:AOD | |
| research data | PROC:AOD | |
| study data | PROC:AOD | |
| sample by method of selection | PROC:AOD | |
| simple random sample | PROC:AOD | |
| stratified random sample | PROC:AOD |