Mathematics, 20.09.2020 06:01 chgraypto

A national survey of middle-school students asks which subject is most challenging. Which of these samples is a representative sample? A. 372 sixth-graders in a certain town B. 972 seventh-graders in a certain county C. 619 eighth-graders in different states D. 400 students from various states, representing different grades, 6–8

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A national survey of middle-school students asks which subject is most challenging. Which of these s...