So I would want to try to figure out why, so we look at our data set with other variables that have been measured, may be more demographic but they might help us to understand what's going on and then of course, I wouldn't just leave the data set group together after this 'cause if you calculate a mean the mean's going to be sort of a balancing point and that's not really reflecting of the group very well. wouldn't make sense to summarize this data together. 