+
Finding Sample Size with Predetermined Margin of Error and Level of Confidence for a Proportion

Finding Sample Size with Predetermined Margin of Error and Level of Confidence for a Proportion

Author: Al Greene
Description:

• Demonstrate how to use the margin of error formula (z*• S ) to calculate sample size when given a predetermined margin of error and level of confidence for a one-proportion z-interval
• Review standard error for proportions.

This packet shows you the method to find the minimum required sample size when you are already given a margin of error and confidence level. We show you several examples of calculating sample sizes, and review what the standard error for proportions is.

(more)
See More

Try Our College Algebra Course. For FREE.

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

25 Sophia partners guarantee credit transfer.

221 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 20 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial

What's in this packet

This packet covers sample size estimation for a proportion, given a margin of error and confidence level. There are no new terms in this packet.

Source: Greene

Sample Size Estimation

This powerpoint shows you the two methods for calculating sample sizes based on predetermined margins of error.

Source: Greene

Sample Size Proportions Statistics

This video shows how to find a desired sample size for a proportion.