Question

in a study, the sample is chosen by separating all cars by size, and selecting 10 of each size grouping. what is the sampling method?
simple random
systematic
stratified
cluster
convenience

Explanation:

Stratified sampling divides the population into subgroups (strata) based on a characteristic (here, car size), and then samples from each subgroup. In this case, cars are divided by size and a fixed - number (10) is selected from each size - group.

Answer:

Stratified