Your question is Sampling Techniques Used. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What kind of sampling technique has been used?
Asked in the Project discussion stage.
Answer the question using the sampling approach described in the project discussion. State the technique by name, explain how observations were selected, and distinguish sampling from treatment randomization where relevant.