[raulgomez05]

Throw this poll away. 20% of those polled aren't even registered to vote.

Where does it say that?

[xzins]

it doesn’t say that; it says of 2973 surveyed 2373 were registered voters. People are confusing Pew’s giving the total number surveyed with the number who were registered and used in the actual numbers.

There could, however, be a problem with the party affiliation weightings, but that, too, depends on how they arrived at them.

[Sudetenland]

SAmple size total - 2973 . . registered voters 2373.

2973 - 2373 = 600. 600/3000 = 0.2 = 20%.

The devil is in the details. :)

[Former Proud Canadian]

The poll was conducted by landline and cellphone June 28-July 9, 2012 among 2,973 adults, including 2,373 registered voters. The samples were weighted to account for demographic composition, with sampling errors taking into account the effect of weighting.

2,373 registered adults, the rest, 620 not registered. Almost 20%.