Other Sampling Methods — Quiz

Question 2 • Statistics and Probability

A teacher is interested in students’ opinions about an upcoming school dance. Which of the following techniques uses systematic random sampling?

Answer

Survey the first 10 students who arrive.

Survey the 10th student arriving at school (with the number 10 being randomly chosen), then survey every other boy and every other girl after that.

Survey every 10th classroom as the teacher walks down the hallway.

Survey the 10th student arriving at school (with the number 10 being randomly chosen), then survey every 12th student after that.

Explanation

Systematic random sampling begins with a randomly chosen starting point, then selects people at a fixed interval. In choice C, the teacher randomly selects the 10th student as the start and then surveys every 12th student. Choice A does not use a random starting point, and choice D changes the interval based on gender.

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