Question

which sampling method involves selecting entire groups or clusters at random? a. systematic sampling b. cluster sampling c. random sampling d. stratified sampling

Explanation:

Cluster sampling is a method where entire groups or clusters are selected at random. Systematic sampling involves selecting elements at regular intervals. Random sampling selects individual elements randomly. Stratified sampling divides the population into subgroups (strata) and samples from each.

Answer:

B. Cluster sampling