Question: I need help with a question. The question is asking about an estimate needed for the cost of books at a school. The variable should

I need help with a question.

The question is asking about an estimate needed for the cost of books at a school. The variable should represent the total cost of the books purchased by the students. 100 students should be randomly selected to get the cost. E represents average costs for all 100. So the problem wants to have parameter the admissions offices wishes to estimate described as well as the population, what variable is involved and a description of the sample.

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