1 / 5

Margin of Error

Margin of Error. Discuss with a partner the difference between a POPULATION & a SAMPLE; Give three examples of each… POPULATION SAMPLE 1. 1. 2. 2. 3. 3. Recap…. A value that tells the uncertainty in our estimate.

ulema
Download Presentation

Margin of Error

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Margin of Error

  2. Discuss with a partner the difference between a POPULATION & a SAMPLE; Give three examples of each… POPULATION SAMPLE 1. 1. 2. 2. 3. 3. Recap…

  3. A value that tells the uncertainty in our estimate. • A measure of how close we believe the SAMPLE proportion is to the POPULATION proportion. • Formula used to predict MOE with 95% confidence ≈ 1 √n What is a Margin of Error (MOE)?

  4. During the week of 8/10/01, CNN conducted a poll asking 1000 Americans whether they approve of President Bush’s performance as President. The approval rating was 57%. In their next poll conducted during the week of 9/21/01, CNN conducted the same poll asking 100 Americans whether they approve of President Bush’s performance as President. The approval rating was 90%. Example

  5. Why the difference in ratings? • Find the MOE in the August poll. • Find the MOE in the September poll. • Explain why the MOE for the August poll in less than that in September.

More Related