Using sampling concepts, the sampling type used in this problem is classified as follows:
c. stratified random.
How are samples classified?
Samples may be classified as:
- Convenient: Drawn from a conveniently available pool.
- Random: All the options into a hat and drawn some of them.
- Systematic: Every kth element is taken.
- Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.
- Stratified: Also divides the population into groups. Then, a equal proportion of each group is surveyed.
In this problem, the people are divided into groups according to their flights, and a few members of each flight are surveyed, hence the sampling type used in this problem is classified as follows:
c. stratified random.
More can be learned about sampling concepts at https://brainly.com/question/25122507
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