Question

identify the kind of sample that is described.
a restaurant manager asked every $3^{\text{rd}}$ person in line at the restaurant about the new commercial jingle.
this sample is a sample.
options:
voluntary response
cluster
stratified
simple random
convenience
systematic

Explanation:

A systematic sample involves selecting every k-th element from a population. Here, the manager selects every 3rd person in line, which matches the definition of a systematic sample.

Answer:

systematic