Data Collection. Data Aggregation . Data Collection Methods . Dual Data Collection . Aggregation, Data . Collection Method, Data . Collection Methods, Data . Collection, Data . Collection, Dual Data . Data Collection Method . Method, Data Collection . Methods, Data Collection . 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. . 1.00