Video: Confidence Interval of a Proportion
This video lesson explains how to construct a confidence interval for a proportion when the following conditions are true:
- The sampling method is simple random sampling.
- Population size is at least 20 times sample size.
- The sample includes at least 10 successes and at least 10 failures.
Key points are illustrated step-by-step with a sample problem.
About This Video Lesson
This is a video version of Lesson 52 from Stat Trek's free online tutorial covering the complete curriculum for Advanced Placement (AP) Statistics. The written version of material covered in this video is available at https://stattrek.com/confidence-interval-proportion.
Prerequisite
This lesson assumes that you know what a confidence interval is and you know how to interpret a confidence interval, material we covered in a previous lesson. If you are not familiar with confidence intervals, it may be helpful to review the following lesson:
- Lesson 51: What is a Confidence Interval?
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 57 video lessons, one video lesson for each of the first 57 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.