Packs of goblins are expected. Giant badgers are not. Besides, CR is only an approximation and when the quantity of creatures is more than 3 times the number of the party, the formulas are... very unreliable. It more depends upon the party make-up, abilities, resources and the players tactical skills.
You can throw an encounter that has an adjusted CR three times the party level at them and it's can be a simple fight for the party, if things are just so. Or you can walk away with a 1:1 encounter giving you a TPK.