Final answer:
A sociologist ensures that data are statistically representative of the population being studied through the use of surveys.
Step-by-step explanation:
A sociologist ensures that data are statistically representative of the population being studied through the use of surveys. Surveys collect data from subjects who respond to a series of questions about behaviors and opinions in the form of a questionnaire or an interview. The survey method is widely used in sociological research and allows for a level of anonymity for respondents to express their personal ideas.