Respuesta :
Answer: Completely Randomized
Step-by-step explanation:
effect of one primary factor rather than many different variables
As per the question the retailer wants to study the return policy that can increase the buying behavior and selects a random sample of 2000.
- He uses matched pair of designs in his experiment design in which participants of the same traits get grouped in pairs.
- After which within each pair, one participant gets randomly allotted to either the treatment, and the other is assigned to the other part.
Hence the option D is correct.
Learn more about the study whether more.
brainly.com/question/14894261.
