Question

An airline company is interested in the opinions of their frequent flyer customers about their proposed new routes.​ Specifically, they want to know what proportion of them plan to use one of their new hubs in the next 10 months. Of their​ customers, 45​% are​ silver-level, 30% are​ blue, and 25​% are red. They first compile separate lists of​ silver, blue, and red members and then randomly select 4500 silver​ members, 3000 blue​ members, and 2500 red members to​ e-mail. They take that sample of​ 10,000 and send them an​ e-mail message with a request to fill out a survey in exchange for 2000 miles. What kind of sampling method have they​ used?

Answer 1

Answer: Stratified Sampling

Explanation: Stratified sampling is a type of sampling method where the population is divided into groups called strata.

Participants will now be selected from each group at random to participate in the survey.