Qualitative research methods | Education homework help

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1.A tremendous amount of research is conducted each year through secondary analysis. What is a secondary analysis and what are the advantages and disadvantages of using secondary data?  Give an example of a study that was done using secondary data analysis and summarize the findings briefly.  Be sure the study is peer-reviewed. {1/2 page}   

2. Generally speaking, what are some advantages and disadvantages to doing survey research? {1/2 page}