i am assessing a cbc study of 330 participants, having 8 attributes with 3-5 levels, 10 random & 3 fixed holdout tasks with 4 concepts + none option.
After chosing my model I want to conduct a sensitivity analysis in my master thesis. As number of products for the base-case-scenario were not specified I am wondering how many products I should include.
Should I use 4 products (equals the number of level for attribute "brand"and the amount of concepts the participant had to decide from)?
Thank you in advance,