Final answer:
Qualitative data, also known as categorical data, describes qualities or characteristics, such as hair color or ethnic group. It is not measured numerically, but described by words or letters.
Step-by-step explanation:
Qualitative data, also known as categorical data, describes qualities or characteristics of a population. Examples of qualitative data include hair color, blood type, ethnic group, and the car a person drives. Qualitative data is generally described by words or letters and is not measured numerically. Researchers often prefer quantitative data for mathematical analysis, as it can be measured and counted.