Siddharth Kalla62K reads

In statistics margin of error plays a very important role in many social science experiments, surveys, etc.

Discover 24 more articles on this topic

Don't miss these related articles:

The margin of error determines how reliable the survey is or how reliable the results of the experiment are.

Any survey takes a sample population from the whole population and then generalizes the results to the whole population. This invariably leads to a possibility of error because the whole can never be accurately described by a part of it.

This is captured in statistics as margin of error. The higher the margin of error, the less likely it is that the results of the survey are true for the whole population.

In statistics margin of error is related to the confidence interval as being equal to half the interval length. This means higher the confidence interval, higher the margin of error for the same set of data. This is expected because to get a higher confidence interval, one usually needs higher data points. It is also quite expected that as the number of samples increases, the margin of error decreases.

The margin of error is usually expressed as a percentage, but in some cases, may also be expressed as the absolute number. In statistics margin of error makes the most sense for normally distributed data, but can still be a useful parameter otherwise.

With margin of error, the statistics represented by the survey make sense. If a survey finds that 36% of the respondents watch television while eating lunch, the information is incomplete. When the margin of error is specified, say, 4%, then this means the 36% should be interpreted as 32-40%. This makes complete sense.

However, there are scenarios in statistics when margin of error is unable to take care of the error of the survey. This happens when the survey has poorly designed questions or the respondents have other bias in their answering or are lying for some reason. Also, if the sample is not chosen to be representative of the whole population, errors beyond the margin of error may occur.

Full reference:

Siddharth Kalla (Jan 9, 2009). Margin of Error (Statistics). Retrieved Oct 22, 2021 from Explorable.com: https://explorable.com/statistics-margin-of-error

The text in this article is licensed under the Creative Commons-License Attribution 4.0 International (CC BY 4.0).

This means you're free to copy, share and adapt any parts (or all) of the text in the article, as long as you give ** appropriate credit** and

That is it. You don't need our permission to copy the article; just include a link/reference back to this page. You can use it freely (with some kind of link), and we're also okay with people reprinting in publications like books, blogs, newsletters, course-material, papers, wikipedia and presentations (with clear attribution).

Discover 24 more articles on this topic

Don't miss these related articles:

Thank you to...

This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 827736.

Subscribe / Share

- Subscribe to our RSS Feed
- Like us on Facebook
- Follow us on Twitter
- Founder:
- Oskar Blakstad Blog
- Oskar Blakstad on Twitter

Explorable.com - 2008-2021

You are free to copy, share and adapt any text in the article, as long as you give *appropriate credit* and *provide a link/reference* to this page.