Why would a pollster use weighing on a poll?
The data collected were incomplete, and the pollster needs to reach a conclusion.
Groups are over- or under-represented, and the data need to be corrected to better represent those groups.
Weighing, like sampling, allows a pollster to take a random group of people and multiply out their answers to represent the entire group’s position.
Weighing adjusts surveys during analysis to ensure that demographic values are represented.
