[formercalifornian]

What does weighted mean?

[maryz]

I believe it means that they have the Rep/Dem/Ind breakdown of the state reflected in the percentages of the respondents.

[Verginius Rufus]

I'm not sure what "weighted" means in this context, but it may mean they use a formula that counts a vote more or less depending on the polled person's BMI (body mass index). A 260-pound person's opinion would count twice as much as a 130-pound person.

But that's just a guess.