1 / 6

STA 2023

STA 2023 . Section 7.3 Hypothesis Testing for the Mean. Critical Value in a t-Distribution.

inez-robles
Download Presentation

STA 2023

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. STA 2023 Section 7.3 Hypothesis Testing for the Mean

  2. Critical Value in a t-Distribution

  3. Example 2: A local brewery distributes beer in bottles labeled 12 ounces. A government agency thinks that the brewery is cheating its customers. The agency selects 20 of these bottles, measures their contents, and obtains a sample mean of 11.7 ounces with a standard deviation of 0.7 ounce. Use a 0.01 significance level to test the agency's claim that the brewery is cheating its customers. • Answer: There is not sufficient evidence at the 1% level of significance to support the government agency's claim that the brewery is cheating its customers.

  4. Example 3: A local group claims that the police issue more than 60 speeding tickets a day in their area. To prove their point, they randomly select two weeks. Their research yields the number of tickets issued for each day. The data are listed below. At α = 0.01, test the group's claim. 70 48 41 68 69 55 70 57 60 83 32 60 72 58 • Answer: There is not sufficient evidence at the 1% level of significance to support the claim that the police are issuing more than 60 speeding tickets a day.

More Related