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Qualitative research involves analysis of data such as words (e.g., from interviews), pictures (e.g., video), or objects (e.g., an artifact). Quantitative research involves analysis of numerical data.
1. Which research methodology requires researchers to gather data and information that can be converted to numbers for statistical analysis?
Data analysis requires researchers to sort out nonusable data such as incomplete questionnaires or dropouts in an experiment; code and edit data to meet the computer requirements; and analyze data quantitatively, qualitatively or both.
.. Statistics is the science which deals with the collection,presentation,analysis and interpretation of numerical data, as well as drawing valid conclusions and making reasonable decision on the basis of such analysis
The question is utter nonsense! There are plenty of instances in which research is carried out on secondary data - these are data that have been collected by some other body. For example, if you were doing an analysis to examine any relationship between different countries' haul of Olympic medals and their GDP, you would not even do the data collection. You would use published data on GDP and on past medal hauls.