A typical opinion poll uses a sample size of between 1000 and 1500 people. The Current Population Survey samples 50,000 households every month to gather data on employment and unemployment. The main advantage of the much larger sample is that:
A) there is less bias in a large random sample.
B) a large random sample has a smaller margin of error.
C) a larger random sample allows use of stratified sampling.
D) nonsampling errors are smaller in a large random sample.

Question

Quizplus · Accepted Answer

The main advantage of a larger sample size is that it leads to a smaller margin of error. This means that the results of the survey are more likely to reflect the opinions or characteristics of the entire population. In contrast, bias, the use of stratified sampling, and nonsampling errors are not directly related to sample size.

A Typical Opinion Poll Uses a Sample Size of Between