Question

an airline offers a certain flight once per day that usually contains about 250 passengers. the flight offers seats in first class (most expensive), business class, and economy class (least expensive). the airline wants to survey 500 passengers of this flight about their overall satisfaction. the passengers will be selected using a cluster random sample where each flight is a cluster. why might the airline choose a cluster random sample instead of a simple random sample in this setting? choose all answers that apply: a a simple random sample might result in a disproportionate number of passengers from one or more class, but a cluster sample is less likely to suffer this issue. b a cluster sample chooses some passengers from each flight, so the airline will be more likely to get a representative sample. c contacting all of the passengers on a few flights will probably be more efficient than contacting passengers spread out across many flights.

Explanation:

A cluster random sample is more efficient as it involves contacting all passengers on a few flights instead of passengers spread across many flights. Also, it can be more practical in terms of getting a sample that may be more representative in the context of flight - based data collection compared to a simple random sample which may lead to disproportionate class - based representation issues.

Answer:

A. A simple random sample might result in a disproportionate number of passengers from one or more class, but a cluster sample is less likely to suffer this issue.
C. Contacting all of the passengers on a few flights will probably be more efficient than contacting passengers spread out across many flights.