Question

researchers are conducting a survey about what brand of ice cream shoppers prefer. they survey the tenth person who walks into the store and then every fifth person after that. this type of sampling is called
random sampling.
stratified sampling.
systematic random sampling.
cluster sampling.

Explanation:

• Random sampling: Involves selecting individuals randomly without a fixed interval, so this is not it.
• Stratified sampling: Divides the population into groups (strata) and samples from each, which is not the case here.
• Systematic random sampling: Selects a starting point (tenth person) and then every k - th (fifth) person, which matches the described method.
• Cluster sampling: Divides the population into clusters and samples entire clusters, not applicable here.

Answer:

C. systematic random sampling.