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 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 4 455 10 9 9 10 4 5 410 10 10 10 7 749 Develop a 95% confidence interval estimate of the population mean rating for Miami. Round your answers to two decimal places. 6.96 5.56 Hide Feedbackk

Answer 1

Xbar = 6.26

SD (sigma)= 2.4727

95% confidence interval

Xbar +- 1.96 xsigma /(n)^1/2

Xbar +-1.96 x 2.4727 /(50)^1/2

6.26+0.6854 =6.945

and 6.26 - 0.6854 =5.574

Confidence interval is ( 6.945,5.574 )