Mathematics, 28.09.2019 22:00 luis759

Amiddle 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?

one student chosen at random from each grade level
an equal number of students chosen at random from each grade level
the first 10 students from each grade level to arrive at school in the morning
all students arriving on one bus

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