Question: The International Air Transport Association surveys business tra

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.
6 4 6 8 7 7 6 3 3 8
10 4 8 7 8 7 5 9 5 8
4 3 8 5 5 4 4 4 8 4
5 6 2 5 9 9 8 4 8 9
9 5 9 7 8 3 10 8 9 6
a. Compute the sample standard deviation. Please provide the formula, at least one step of calculation, and the correct answer for full credit. (6 points)
b. Develop a 95% confidence interval estimate of the population mean rating for Miami. Please provide the formula, the correct t value, the correct margin of error, at least one step of calculation, and the correct interval for full credit. (12 points)


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  • CreatedSeptember 19, 2013
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