Other Sampling Methods

Question 6 • VA-Probability and Statistics

A paper company wants to survey its employees about a new policy on sales commissions. Which of the following would result in a stratified random sample?

Answer

Give a survey to everyone who was eating lunch in the break room that day.

Randomly select 2 people from each department (sales, customer service, accounting, etc.)

Put everyone’s name on a slip of paper and randomly pull out 10 names.

Using an alphabetized list of employees, randomly select a starting point and survey every 4th person after that.

Explanation

A stratified random sample divides the population into groups, or strata, and randomly selects people from each group. Choosing 2 people at random from every department does this. Option C is a simple random sample, while option D is a systematic sample; option A selects people based on convenience.

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