Mathematics, 05.05.2020 18:58 lilsnsbsbs
1) The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each traveler is asked to provide a rating for the Miami International Airport. The ratings obtained from the sample of 50 business travelers follow.
8 8 4 0 5 5 5 4 4 4 4 3 1 0
6 1 0 1 0 0 8 5 4 3 2 4 7 8 9
1 0 8 4 5 5 4 4 3 8 9 9 5 3
9 8 8 5 1 0 4 1 0 5 5 3 3
Develop a 95% confidence interval estimate of the population mean rating for Miami. Round your answers to two decimal places.
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2)
Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $20,000 and $40,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired.
a. What is the planning value for the population standard deviation?
b. How large a sample should be taken if the desired margin of error is $300? Round your answer to the next whole number.
$150?
Answers: 2
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1) The International Air Transport Association surveys business travelers to develop quality ratings...
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