If the polling is this wacky, why bother publishing it at all?
Over the weekend, ABC and the Washington Post published the results of a poll that made both operations look like its results were the product of a month-long exercise with a Magic 8-Ball. The way you know it was an embarrassment is the Post story about the poll began by telling us all we should probably ignore it completely.
The Post-ABC poll shows Biden trailing Trump by 10 percentage points at this early stage in the election cycle, although the sizable margin of Trump’s lead in this survey is significantly at odds with other public polls that show the general election contest a virtual dead heat. The difference between this poll and others, as well as the unusual makeup of Trump’s and Biden’s coalitions in this survey, suggest it is probably an outlier.
Also keep in mind the sampling bias of only including people willing to take part in polls.
Unknown number? Stranger knocking at my door? I’m not answering.
Yeah this is the Achilles heel of polling. You need a sample as close to random as possible, but that’s hard if 75% of those people don’t respond.