I forgot to mention it in the post but the source for this is from Zkillboard data past 90 days.
there is a problem with this and thats with how kills are counted in Zkillboard, any participating ship will be counted on the kills whilst only a single loss is counted on the targetted hull. Regardless, we take it from the data that a single frigate is far more likely to lose before getting anykills compared to a Cruiser and higher. meaning anyone who is willing to use such ships will naturally have a higher K/D ratio.
So keep that in mind when you cant decide what to undock 😉 😉