Hi ,
I am facing a dilemma where do i create a CBC with 20 versions or with 100 versions for a sample size of 200? there are no restrictions hence it is a full profile balanced overlap design. I looked at Efficiency and Err margins of levels and they all come good in both the designs. So my set of questions are
- What are the drawbacks of a 20 version design vs 100 version design for 200 respondents?
- What are the gains of a 20 version design vs 100 version design for 200 respondents? Since in a 20 version design each version gets 10 responses and in 100 version design every version gets 2 responses, does that affect the estimation in any way?