When I estimate the Part Worth for my ACBC HB I find in the column Average Utilities (Zero-Centered Diffs) the line "None" below all my features and their part worths. What does this "None" mean and stand for?
When I estimate the Part Worth for my ACBC HB I find in the column Average Utilities (Zero-Centered Diffs) the line "None" below all my features and their part worths. What does this "None" mean and stand for?