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For the following questions determine the following: Is the question an estimation or hypothesis testing question? What are the key words or phrases that imply

For the following questions determine the following:

  1. Is the question an estimation or hypothesis testing question?
  2. What are the key words or phrases that imply estimation or hypothesis testing?
  3. State?
  4. ^, sample proportion, as a fraction out of the sample.
  5. If it is a hypothesis test, state the challenging claim.

  1. In June 2012, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing for the country. Out of 1004 respondents, 663 said it was a good thing.Find a 95% confidence interval for the proportion who believe immigration is a good thing.
  2. A card company claims that 80% of all college students send a card to their mother on Mother's Day. Suppose you plan to gather your own data because you think that the proportion has changed. You select a simple random sample of 400 college students to determine the proportion of them who send a card to their mother on Mother's Day.Your sample indicates that 70% of the students sampled send a card to their mother on Mother's Day.Test your claim at the 5% significance level.
  3. An article appearing in the October 4, 1994 issue of The Harrisburg Evening-News reported that Judge Lance Ito (who is tired the O.J. Simpson murder case) had received 812 letters from around the country on the subject of whether to ban cameras from the courtroom. Of these 812 letters, 98% expressed the opinion that cameras should be banned. Use this sample information to conduct a test of significance of whether more than 95% of all American adults feel that cameras should be banned from the courtroom. Is the test result statistically significant at the .01 level?
  4. Harris Interactive conducted a poll of American adults in August of 2011 to study the use of online medical information. Of the 1,019 randomly chosen adults, 60% had used the Internet within the past month to obtain medical information. Use the results of this survey to approximate 95% confidence interval estimate for the percentage of all American adults who have used the Internet to obtain medical information in the past month.

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