5 ms·
Most/many polls weight for this. If the people they reach are 60% seniors and 40% non-seniors, they know that seniors don't make up 60% of the population, so th
by bootlooped 6y ago
Most/many polls weight for this. If the people they reach are 60% seniors and 40% non-seniors, they know that seniors don't make up 60% of the population, so they weight based on likely voter demographic numbers. After 2016 they also started weighting on education level, because they thought that was a factor in the polling miss of 2016.
- redisman 6y agoWeighing of course can add much more uncertainty. What if there is a portion of the country you simply can't reach for some reason, or you hear back from just 2 people? That data would be as good as useless even if you extrapolate with weights.