A private investigator â also known as a PI, Private Detective or Private Eye â is someone that is hired to undertake an investigation. Most states require PIs to be trained and licensed. Investigators often have a law enforcement and/or a military background. Back to Top.
Quantitative vs Qualitative. Quantitative and Qualitative are two terms between which a variety of differences can be identified. Quantitative has a lot to do with the quantity of an object or a person. On the other hand, qualitative has a lot to do with the quality or the attribute of an object or a person.
Some definitions. 1  Quantitative research is âexplaining phenomena by collecting numerical data that are analysed using mathematically based methods (in particular statistics).â*. 2  Qualitative research seeks to answer questions about why and how people behave in the way that they do.