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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. Develop a 95% confidence interval estimate of the population mean rating for Miami.

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STATISTICS F/BUSINESS+ECONOMICS-TE...

13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884

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STATISTICS F/BUSINESS+ECONOMICS-TE...

13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884
Chapter 8.2, Problem 17E
Textbook Problem
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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.

Chapter 8.2, Problem 17E, The International Air Transport Association surveys business travelers to develop quality ratings

Develop a 95% confidence interval estimate of the population mean rating for Miami.

To determine

Find the 95% confidence interval for the population mean ratings for Miami.

Explanation of Solution

Calculation:

The given information is that the international air transport wants to develop the quality ratings for transatlantic gateway airports. The possible ratings are 1 to 10 in an increasing manner. The samples of 50 business travelers’ responses are noted.

Software Procedure:

Step-by-step procedure to obtain the mean value using the MINITAB software:

  • Choose Stat > Basic Statistics > Display Descriptive Statistics.
  • In Variables enter the columns Variable.
  • Choose Statistics and select the mean, standard deviation and N total.
  • Click OK.

Output using the MINITAB software is given below:

From the output, the mean value is 6...

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Chapter 8 Solutions

STATISTICS F/BUSINESS+ECONOMICS-TEXT
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