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 selects individuals randomly without a fixed pattern. Stratified sampling divides the population into subgroups and samples from each subgroup. Cluster sampling divides the population into clusters and samples entire clusters. Systematic random sampling selects every k - th individual after a random start. Here, starting with the tenth person and then every fifth person is systematic random sampling.

Answer:

systematic random sampling.