Im confused as well because halfway between 4 and 5 it says 6 feet

Totally can see why, but I think you just have to weigh your options and consider all the factors. Where you live, time of day, how close the coyotes sounded that night, what season is it, size of the dog, proximity, etc.

For me personally, what I wont do is put my dog on a tie out after dark, because if she was to be attacked she couldnt escape. Shes 40lbs and she loves her freedom to roam, so I let her out to do her business alone. I always stay by the door and listen / wait for her if its dark.

Recently moved to a main road and after a few months of boundary training and serious consideration, I made the same call as when I lived in the woods. We dont have a fence yet, but she can go out alone. We still have all the same predators as before, so its twice as risky or more than before.

Ultimately, her life is better because she gets to roam our land, so for me the risk reward went in favor of letting her.