What type of research includes examining previously collected data?

The choice of secondary research is correct because this type of research involves the analysis of data that has already been collected and published by others. It can include a variety of sources, such as academic journals, books, reports, and previously conducted surveys. Secondary research is valuable as it can save time and resources, allowing researchers to draw insights from existing findings rather than starting from scratch.

In contrast, primary research refers to the gathering of new data directly from respondents through methods such as surveys, interviews, or experiments. Experimental research specifically involves manipulating variables to establish cause-and-effect relationships, which differs from simply analyzing existing data. Qualitative research focuses on understanding concepts, experiences, or social phenomena, often through methods like interviews or focus groups, rather than analyzing previously collected quantitative data. Therefore, the definition and process of secondary research make it the appropriate answer for examining previously collected data.