Before collecting data, social researchers must identify a from which to select their after that, if they want to interview sociologists must first get which means that participants agree to be interviewed and know what they are getting into.

Target population , sample , respondents , informed consent.

Explanation:

Before collecting data, social researchers must identify a target population from which to select their sample. After that, if they want to interview respondents, sociologists must first get informed consent, which means that participants agree to be interviewed and know what they are getting into. The target population is the people the researcher wants to study, for example, teenage girls. From that population, the researcher chooses a sample that is a group from which collect the data. This group should be representative of the target population. The people who answer to question are the respondents who have to be informed about what they are getting into and sign informed consent.