Final answer:
Counting variables, or quantitative variables, include factors we can count. Qualitative variables are variables that express a quality and do not have a numerical value.
Step-by-step explanation:
Counting variables, also known as quantitative variables, are factors that can be counted, such as the number of books on a shelf or the number of students in a class. On the other hand, quality variables, or qualitative variables, express qualities and do not have a numerical value. Examples of qualitative variables include hair color, blood type, and favorite subject in school.