Answer
Clustered sampling technique is used as the area is divided into groups and then some of the groups were selected as a whole. Bias can be introduced by responders and preferences of interviewers.
Work Step by Step
No steps
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.