luis wants to conduct a study of members of 3...

luis wants to conduct a study of members of 35 gyms in a city. he randomly selects 7 of these gyms and collects the data for every gym member. which sampling method did he use?\na. cluster sampling\nb. systematic sampling\nc. convenience sampling\nd. stratified sampling

Answer

# Answer: A. cluster sampling # Brief Explanations: In cluster sampling, the population is divided into clusters (here, gyms are clusters). Luis randomly selected some clusters (7 gyms) and included all members of those selected clusters in the study, which fits the definition of cluster sampling.