8. The airline company from Exercise 4, interested in the opinions of their freq

Question

8. The airline company from Exercise 4, interested in the opinions of their frequent flyer customers about their proposed new routes, has decided that different types of customers might have different opinions. Of their customers, 50% are silver-level, 30% are blue, and 20% are red. They first compile separate lists of silver, blue, and red members and then randomly select 5000 silver members, 3000 blue members, and 2000 red members to e-mail. What kind of sampling method have they used?

The population

The population parameter of interest

The sampling frame

The sample

The sampling method, including whether or not randomization was employed

Any potential sources of bias you can detect and any problems you see in generalizing to the population of interest

Explanation / Answer

The Sampling Frame.

Because they first compile the list of silver, blue and red members.

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