I'm doing some work and don't really know if there is a better way to proceed. I have vendor information of how much premium they bring in, and how much losses they incur. With those 2 figures, I can get a 'loss ratio' of each vendor. My job is to look through the list and Identify any 'problem' vendors. I,e consistently high loss ratios over a 3 year period etc. The issue is that since loss ratio depends on premiums, I might have a high loss ratio just because of low premiums. So an 800% loss ratio on 80,000 premium paints a different picture than an 800% loss ratio on 80 premium. So with that in mind, is there a way for me to filter out the data that is not credible? Should I just get an average of the premiums and then analyze only the premiums above the average?