Question

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 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 business travelers follow. 7 7 3 8 4 4 4 5 5 5 5 4 9 10 9 9 8 10 4 5 4 10 10 10 11 4 9 7 5 4 4 5 5 4 3 10 10 4 4 8 7 7 4 9 5 9 4 4 4 4

Develop a 95% confidence interval estimate of the population mean rating for Miami.Enter your answer using parentheses and a comma, in the form (n1, n2).

Answer 1

(5.2591, 9.3531)

Explanation:

given that the International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airports.

Ratings are from 1 to 10

the readings are

7 7 3 8 4 4 4 5 5 5 5 4 9 10 9 9 8 10 4 5 4 10 10 10 11 4 9 7 5 4 4 5 5 4 3 10 10 4 4 8 7 7 4 9 5 9 4 4 4 4

Mean = 7.3061

Std deviatin = 7.3100

Std error =
`(7.310)/(√(49) ) \\=1.0443`

95%,confidence interval =
`7.3061 ±2.047 \\=(5.2591, 9.3531)`