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.

1	5	6	7	8	8	8	9	9	9	9	10	3
4	5	5	7	6	8	9	10	5	4	6	5	7
3	1	9	8	8	9	9	10	7	6	4	8	10
2	5	1	8	6	9	6	8	8	10	10

Develop a  confidence interval estimate of the population mean rating for Miami. Round your answers to two decimal places.

Answer 1

Solution: Since the confidence level is not given, we can assume it to be 95%. The 95% confidence interval estimate for the population mean rating for Miami is given below:

Where:

is the sample mean

is the sample standard deviation

is the critical value at 0.05 significance level for

Therefore, the 95% confidence interval is:

Therefore, the 95% confidence interval estimate of the population mean rating for Miami is