Video: Margin of Error
Here is a video version of Lesson 50 from Stat Trek's free online tutorial covering the complete curriculum for Advanced Placement (AP) Statistics.
About This Video Lesson
The margin of error is a measure of the uncertainty in a survey outcome, given a particular sampling plan. In combination with a confidence level, the margin of error defines a range of values within which the true population value may be found. This video explains how to compute the margin of error, and walks through a sample problem to show each element of the computation step-by-step.
A written version of the material covered in this video is available at https://stattrek.com/estimation/margin-of-error.
Prerequisite
This video lesson refers to the standard error of a statistic, a topic covered in a previous lesson. If you are not familiar with the standard error, it may be helpful to review the following lesson:
- Lesson 49: What is the Standard Error?
About Stat Trek's Video Series
A little history: About two decades ago, Stat Trek produced a free online tutorial covering the complete curriculum for AP Statistics. The tutorial, which can be found at https://stattrek.com/tutorials/ap-statistics-tutorial, was to designed to help students prepare for and pass the AP Statistics exam. Consisting of 69 easy-to-understand written lessons, the tutorial was very well-received.
Of course, there is always room for improvement. With that in mind, some students suggested supplementing the written lessons with video instruction. The Stat Trek video series is our response to that suggestion. So far, we've produced 50 video lessons, one video lesson for each of the first 50 written lessons from Stat Trek's' AP Statistics Tutorial.
The work continues. We're adding videos little by little. Eventually, we intend to have a video for each of the 69 written lessons from the tutorial.