The sampling that Joan is using is known as cluster sampling.
It should be noted that sampling simply neans when a sample of a population is taken in order to illustrate the characteristics of the entire population.
In this case, the sampling that Joan is using is known as cluster sampling. This was depicted as she randomly select 10 flights from all available data in the past year.
Learn more about sampling on:
brainly.com/question/17831271
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