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:

Systematic random sampling involves selecting every \( n \)-th element from a population after a random start. Here, the researchers start with the 10th person and then survey every fifth person, which fits the definition of systematic random sampling. Random sampling is more general without a fixed interval, stratified sampling divides the population into groups first, and cluster sampling divides into clusters. So the correct type is systematic random sampling.

Answer:

C. systematic random sampling (assuming the options are labeled as A. random sampling, B. stratified sampling, C. systematic random sampling, D. cluster sampling; if the original option labels differ, adjust the identifier but keep the text "systematic random sampling" with its correct option identifier)