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Answer the following questions from your textbook.
pp. 325-326—Question 6.47 (parts a – c)  and Question 6.54 (parts a – c);

6.47 REACHING THE AMERICAN DREAM. Refer to Exercise 3.13 and the 2019 Even survey on reaching the “American Dream” (i.e., home ownership and financial stability). Of the 1,083 Americans who participated in the survey, 260 (or 24%) claimed to have achieved the “American Dream.” Let p represent the true proportion of all Americans who believe they have achieved the American Dream.

  1. Give a point estimate of p.
  2. Compute an interval estimate of p. Use a confidence coefficient of .90.
  3. Practically interpret the interval, part b.
  4. Explain the theoretical meaning of the confidence coefficient, .90.

6.54 STUDY OF AIRCRAFT BIRD-STRIKES. As worldwide air traffic volume has grown over the years, the problem of airplanes striking birds and other flying wildlife has increased dramatically. The International Journal for Traffic and Transport Engineering (Vol. 3, 2013) reported on a study of aircraft bird strikes at Aminu Kano International Airport in Nigeria. During the survey period, a sample of 44 aircraft bird strikes were analyzed. The researchers found that 36 of the 44 bird strikes at the airport occurred above 100 feet. Suppose an airport air traffic controller estimates that less than 70% of aircraft bird strikes occur above 100 feet. Comment on the accuracy of this estimate. Use a 95% confidence interval to support your inference.

p. 343— Question 6.111 
Submit Homework 4 as a Word document to the appropriate assignment folder no later than Sunday 11:59 PM EST/EDT. (This assignment folder may be linked to Turnitin.)

*6.111

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