In election years, the polls that are conducted by such companies as Gallup and Harris typically employ stratified random sampling to reduce the number of people that will need to be surveyed.

Question

Quizplus · Accepted Answer

Stratified random sampling is used to ensure that the sample is representative of the population, by dividing the population into different subgroups (strata) and then randomly selecting participants from each subgroup. This method helps in reducing sampling error and ensures that all segments of the population are adequately represented, making it unnecessary to survey the entire population.

In Election Years, the Polls That Are Conducted by Such