Trend analysis (evolution & comparison)
Hi all, I have a data set with continous variable (not linked together). I have, over the year, data on the use of 3 products (expressed in DDD) and their efficacy (expressed in %). Annual value for each of the data.1) I would like to know how to test the evolution of the efficacy/consumption over the years (is it significatively increasing or decreasing and cherry on the cake, when does it become...