Polaris' Help Center:
Statistical Tool for Calculating the Margin of Error in Survey Data Analysis

The term "margin of error" can be used to mean
sampling error in general. In media reports of poll results, the term usually refers to the maximum margin of errorfor any percentage reported from that poll. The margin of error is a statistic expressing the amount of random sampling error in a survey's results. The smaller the margin of error, the more trust you can place that the survey's reported results are "true" (that is, representative of the larger population).

Click on your button choice below to launch the appropriate calculator.(Click on the button again to close the calculator)

Margin of Error Calculator - Proportions

Margin of Error Calculator - Means

Get Our Margin of Error White Paper