1 / 6

8.3 #6

8.3 #6. In a survey, 1864 our of 2246 randomly selected adults in the US said that texting while driving should be illegal. Consider a hypothesis test that uses a .05 significance level to test the claim that more than 80% of adults believe that texting while driving should be illegal. 8.3 #10.

riva
Download Presentation

8.3 #6

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. 8.3 #6 In a survey, 1864 our of 2246 randomly selected adults in the US said that texting while driving should be illegal. Consider a hypothesis test that uses a .05 significance level to test the claim that more than 80% of adults believe that texting while driving should be illegal.

  2. 8.3 #10 In a presidential election 308 out of 611 voters surveyed said that they voted for the candidate who won. Use a .01 significance level to test the claim that among all voters, the percentage who believe that they voted for the winning candidate is equal to 43% which is the actual percentage of votes for the winning candidate. What does the result suggenst about voter perceptions?

  3. Section 8.5 #12 Find and interpret the p-value for a left tailed test with n=11 and test statistic t=-3.518 #10 Find and interpret the p-value for a two tailed test with n=15 and test statistic t=1.495

  4. 8.5#19 Researchers collected a simple random sample of the times that 81 college students required to earn their bachelor’s degrees. The sample has a mean of 4.8 yrs. and a standard deviation of 2.2 years. Use a .05 significance level to test the claim that the mean time for all college students is greater than 4.5 years.

  5. 8.5 #27 Tests were conducted with crashes of new cars traveling at 6 mph. The total cost of the damage was found. Results are listed for a SRS of tested cars. Use a .05 significance level to test the claim that when tested under the same standard conditions, the damage costs for the population of cars has a mean of $5,000. The costs appear to be normally distributed. $7448 $4911 $9051 $6374 $4277

  6. 8.5 #20 A SRS of 40 recorded speeds obtained from cars traveling in a 65 mph speed zone had a mean of 68.4 mph with a standard deviation of 5.7 mph. Use a .05 significance level to test the claim that the mean speed of all cars is greater than the posted speed limit of 65 mph.

More Related