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Identify the sampling technique used for the following study. First, the population is subdivided by class. Then a quality assurance analyst uses a random number generator to select five members from each class to study.

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Answer:

Stratified Sampling

Step-by-step explanation:

Stratified sampling, the population is first divided into small subgroups or strata based on similarity or characteristics in such a way that the elements within the group are the similar and different among the other subgroups formed. Then, the elements are randomly selected from each of these subgroups or strata.      

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