Anthropology Practice Test 2026 – The Comprehensive All-in-One Guide for Exam Success

In survey research, the term that refers to the attributes that differ among members of a population is "variables." Variables are essential in understanding how individuals within a population vary in terms of characteristics, behaviors, opinions, and other measurable factors. For example, age, income, education level, and attitudes are all considered variables because they can change from one individual to another.

On the other hand, the other options do not encapsulate the concept of differing attributes. "Unknowns" does not specifically refer to attributes or features of the population but instead suggests a lack of information. "Questionnaires" are tools used to collect data and contain the questions posed to participants, while "interviews" are a qualitative method for gathering information, often more in-depth and personal, but they do not define the differing characteristics themselves. Thus, "variables" is the most appropriate term to describe attributes that vary among members of a population in survey research.