Exhibit 11-5

Multiple Choice

Exhibit 11-5.Amie Jackson,a manager at Sigma travel services,makes every effort to ensure that customers attempting to make online reservations do not have to wait too long to complete the reservation process.The travel website is open for reservations 24 hours a day,and Amie regularly checks the website for the waiting time to maintain consistency in service.She uses the following independently drawn samples of wait time during two peak hours,morning 8 am to 10 am and evening 7 pm to 9 pm,for the analysis.Assume that wait times are normally distributed. Refer to Exhibit 11-5.Identify the 95% interval estimate for the ratio of the population variances.

A) [1.02,8.55]
B) [1.00,8.73]
C) [0.99,8.83]
D) [1.19,7.34]