The Science (and Art) of Election Polling

Major recent polls suggest that former Vice President Joe Biden
will defeat President Donald Trump by a decisive margin in next
week's election. A simulation by FiveThirtyEight shows Biden
winning 88 times in 100, and a model from The Economist puts
Biden’s chances of winning the electoral college at 95%. But for
the obsessive poll watchers who in 2016 were shocked by Trump's
win, today's numbers are fraught. We'll talk about how election
polls are constructed, how to interpret them and how methodologies
have changed since 2016.