Using sampling concepts, the representative sample is given as follows:
D. Every fifth student from an alphabetical list of all seventh graders in the school.
It is a common statistics practice, when we want to study something from a population, we find a sample of this population, which is a group containing elements of a population. A sample has to be representative of the population, that is, it has to involve all segments of the population.
In this problem, the population is all seventh graders, hence the sample has to be representative of all seventh graders. Thus the correct option is:
D. Every fifth student from an alphabetical list of all seventh graders in the school.
More can be learned about sampling concepts at https://brainly.com/question/25122507
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