It’s pretty rare that a pollster calls his own survey an “outlier.” But that’s exactly what happened last week after a Monmouth University poll showed an approximate three-way tie between Bernie Sanders, Elizabeth Warren and Joe Biden. Patrick Murray, director of the Monmouth University Polling Institute — an A-plus-rated pollster according to FiveThirtyEight — issued a statement describing his latest Democratic primary poll as an outlier that diverged from other recent polls of the race. …
What should you do about these seeming outliers? If you’re a pollster, you should follow Monmouth’s lead and publish them!! In fact, printing the occasional expectations-defying result is a sign that a pollster is doing good and honest work. Plus, sometimes those “outliers” turn out to be right. CONT.
Nate Silver, FiveThirtyEight