When the conclusions of research are based on the interpretations of the investigator, research has been employed. However, if the conclusions are based upon statistical analyses of the data, research has been employed. nonobservational; observational qualitative; quantitative quantitative; qualitative observational; nonobservational

When the conclusions of research are based on the interpretations of the investigator, qualitative research has been employed. However, if the conclusions are based upon statistical analyses of the data, quantitative research has been employed.

Explanation:

Simply put, qualitative research does work with numerical data. Its purpose is to analyze more abstract concepts and situations, such as individual's or groups' opinions, behaviors, beliefs, interactions etc. On the other hand, quantitative research works with numerical data and relies on statistics, computation, and mathematics to come to results. Its purpose is to quantify the problem under study.