Mathematics, 30.11.2020 18:00 avision42

A middle school contains sixth, seventh, and eighth graders. Each grade level contains approximately the same number of students. The principal wants to find the answer to a survey question affecting each student in the school. He asks a sample group "What time do you get up in the morning?" Which of these characteristics define the best sample?

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A middle school contains sixth, seventh, and eighth graders. Each grade level contains approximately...

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