Awildlife researcher weighed all the raccoons that were trapped in suburban neighborhoods before they were released back into the wild. the researcher used this data to conclude that the raccoons in the state were getting heavier. what error did the researcher make?

Hey there!
Great question:)

The wildlife researcher made a teeny error, and this is because the unit is biased. (only weighed raccoons that were trapped in suburban neighborhoods) As stated in the problem "weighed all the raccoons that were trapped in suburban neighborhoods"

I hope this helps;)