In public opinion polling,a sample as small as about ________ people can faithfully represent the "universe" of Americans.

Question

Quizplus · Accepted Answer

A sample size of about 1,500 people is considered statistically significant for a population of millions of Americans. This is because of the law of large numbers, which states that as the sample size increases, the margin of error decreases, making the results more accurate. Additionally, polling firms use a variety of techniques, such as stratified sampling and random sampling, to ensure that their sample is representative of the larger population. Therefore, a sample size of 1,500 is generally sufficient for accurately representing the opinions of Americans.

In Public Opinion Polling,a Sample as Small as About ________