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| Data Collection Survey Methods | Surveys | Baseline Survey | Community Surveys | Contraceptive Prevalence Surveys | Data Aggregation | Data Linkage | Data Sources | Dual Data Collection | Methodology, Survey | Nonrespondents | Randomized Response Technic | Respondents Systematic gathering of data for a particular purpose from various sources, including questionnaires, interviews, observation, existing records, and electronic devices. The process is usually preliminary to statistical analysis of the data. |