Margin of Error

Question

In the 2016 Presidential Election, most Americans were inundated with poll results, all of which reported margin of error. Discuss what a margin of error means in poll results. What does it tell us and why it is necessary to include this information in the poll results?

What is the roll of sample size in studies like this?

Answer 1

The margin of error is a statistic expressing the amount of random sampling error in the results of a survey. The larger the margin of error, the less confidence one should have that a poll result would reflect the result of a survey of the entire population.