Q: What are the various methods of collecting data for quantitative study?
Thank you for your question. For quantitative studies, the data collected should be empirical in nature. Depending on the topic of the study, some common methods of data collection are: performing experiments to measure values, collecting measurable data through surveys (i.e. participants designate points/ratings), and analyzing existing databases (e.g. population census). The data collection method can vary with the research design, but should be gathered in or converted to numerical values that can then be statistically analyzed.
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Hope this helps. All the best for your study!