[jonno]

Sorry for my ignorance but can you give us the “polling for dummies” version? How does weighted vs non-weighted percentages affect the results?

[stylin19a]

sorry. Here is the explanation:

This survey uses statistical weighting procedures to account for deviations in the survey sample from known population characteristics, which helps correct for differential survey participation and random variation in samples. The overall adult sample is weighted to recent Census or American Community Survey data using a sample balancing procedure to match the demographic makeup of the population by region, gender, age, education and race. Margins of sampling error for this survey are not adjusted for design effect.

In this particular poll, I couldn't find anything non-weighted.

Weighted means that they will "adjust" based upon whatever criteria is necessary.

If 50% of the calls are to republicans, they will adjust that downward, as they do not consider the country as a whole 50% republican based on the above. What algore-tythm they use ? who knows.

here a link to the demographic stuff: https://www.qu.edu/images/polling/us/us08252016_demos_U88mxwn.pdf