Cochran Armitage exact?
I have data for a 5 year period. there is binary feature (registered/unregistered) represented by a column in the data. I want to see if there is a trend for proportion unregistered items year by year across the 5 year period. The Cochran Armitage trend test seems like the appropriate statistic (yes?). The the number of unregistered items is single digits for multiple years, and is even zero ...