Which of these is an example of a random sample?

A. Every twentieth caller to an independent radio station receives tickets to a concert.

B. Customers buying a new cell phone are surveyed about cell phone plans.

C. A phone plan company surveys people on the beach to see how well they are receiving service, and uses this information in future advertising.

D. A phone survey is conducted using twenty names randomly taken from the phone book.

Question

Mathematics

Atticus Walsh

1 June, 15:41

Which of these is an example of a random sample?

A. Every twentieth caller to an independent radio station receives tickets to a concert.

B. Customers buying a new cell phone are surveyed about cell phone plans.

C. A phone plan company surveys people on the beach to see how well they are receiving service, and uses this information in future advertising.

D. A phone survey is conducted using twenty names randomly taken from the phone book.

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Answers (1)

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Krish · Answer 1

"D. A phone survey is conducted using twenty names randomly taken from the phone book" is the only example of a random sample. All the others take into account the environment.