Question

Which of the following sampling procedures involve the use of probability sampling?

a . A college student is hired to interview a sample of voters in her town. She stays on campus and interviews 100 students in the cafeteria.

b . A pollster wants to interview 20 gas station managers in Balti more. He posts a list of all such managers on his wall, closes his eyes, and tosses a dart at the list 20 times. He interviews the people whose names the dart hits

Short answer

Only sampling procedures given in part (b) involves the use of probability sampling.

Step-by-step solution

Part (a) Step 1. Given information.

The given statement is:

Which of the following sampling procedures involve the use of probability sampling?

(a) A college student is hired to interview a sample of voters in her town. She stays on campus and interviews 100 students in the cafeteria.

(b) A pollster wants to interview 20 gas station managers in Balti more. He posts a list of all such managers on his wall, closes his eyes, and tosses a dart at the list 20 times. He interviews the people whose names the dart hits

Part (a) Step 1. Identify if the sampling procedure given in option (a) involves the use of probability sampling.

As in process (a), the hired college student selects a sample that does not represent the voters in her town, and also no random device or random number is employed, as is done in probability sampling.

Therefore, Option A does not involve the use of probability sampling.

Part (b) Step 1. Identify if the sampling procedure given in option (b) involves the use of probability sampling.

In contrast, the approach used in (b) is an example of selecting gas station managers at random.

Therefore, Option B involves the use of probability sampling.