Jackie is doing a study on the number of hours spent watching television and how this affects family cohesion. She decides to mail a questionnaire to randomly selected households in her state. This is an example of a survey.

self-administered        

Explanation:

Self-administered survey: In research methods, the term "self-administered survey" is described as one of the different survey methods that are being designed in a structured form and consists of a specific series of different "open-ended" and "closed-ended" questions. However, it is being denoted as "self-administered" because the respondents or the participants of the survey fill the given questionnaire themselves, in the absence of any interviewer.

In the question above, the given statement is an example of a self-administered survey.