Survey Margin of Error: What is it? How does it relate to sample size?

What is the margin of error? How do I calculate the margin of error? How do I use the margin of error to read survey results?
Have you ever wondered what the margin of error was when you see survey results or the results of a poll? It's the small text that says +/- x% where x is a number.
This video will explain what the margin of error is and how to use the margin of error to calculate the sample size you need for your survey and how to correctly read the results of your survey.
The file you see on the video is available to download.
This video is one lesson contained with a beginner course on Data Literacy.
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