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Old 03-11-2015, 12:48 PM
 
Location: Victoria TX
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How do opinion surveys randomize the population to be sure their sample is not skewed? People who still have landlines are no longer a representative sample, nor are licensed drivers or registered voters.
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Old 03-11-2015, 01:38 PM
 
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I've only had a cell phone for 15 years...and the pollsters still managed to call me twice since then.
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Old 03-11-2015, 01:56 PM
 
Location: Someplace Wonderful
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There is a whole methodology based upon statistics garnered from census data.

You can begin HERE but this is merely the beginning, and the topic is not simple. Math is not simple a lot of the time. One must read a lot to gains even a bit of understanding. I studied stats in the 60's. I studied again in the 90'. Not sure how much I gleaned in either case
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Old 03-12-2015, 08:14 AM
 
37,072 posts, read 38,527,994 times
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Quote:
Originally Posted by jtur88 View Post
How do opinion surveys randomize the population to be sure their sample is not skewed?
They usually attempt to weight the results. If the question was ""Who are voting for President?" they will also ask what party are you affiliated with. They go and look at other surveys to determine how many of one party they should have, if it's skewed they will give more weight to their answers.
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