Primary Data: Primary data is original data collected specifically for a particular research study. It is gathered directly by the researcher through methods such as observations, surveys, or experiments.
Secondary Data: Secondary data refers to existing data that has been collected by someone else for another purpose. Researchers can use secondary data to analyze and draw conclusions without having to collect new primary data themselves.
Sampling: Sampling involves selecting a subset of individuals or elements from a larger population for study. It helps researchers gather representative and manageable data for analysis during field research.