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United Airlines established a discount airline named Ted. The managers were interested in determining how flyers using Ted rate the airline service. They plan to question a random sample of flyers from the November 12 flights between Denver and Fort Lauderdale. A total of 578 people were on the flights that day. United has a list of the travelers together with their mailing addresses. Each traveler is given an identification number (here, from 001 to 578). Use Excel to generate a list of 40 flyer identification numbers so that those identified can be surveyed.
The National Park Service has started charging a user fee to park at selected trailheads and cross-country ski lots. Some users object to this fee, claiming they already pay taxes for these areas. The agency has decided to randomly question selected users at fee areas in Colorado to assess the level of concern.
a. Define the population of interest.
b. Assume a sample of 250 is required. Describe the technique you would use to select a sample from the population. Which sampling technique did you suggest?
c. Assume the population of users is 4,000. Use Excel to generate a list of users to be selected for the sample