问题 选择题

下面是一组同学的跳远成绩:(单位:cm) 455,425,438,402,389,435,395,438,382,390,460,388,412, 420,430,442,421,428,396,454,438,428,416,441,418,420。根据这些成绩设计频数分布表,下列分段合适的是[ ]

A.381~401,401~421,421~441,441~461

B.381.5~401.5,401.5~421.5,421.5~441.5,441.5~461.5

C.382.5~402.5,402.5~422.5,422.5~442.5,442.5~462.5

D.382~402,402~422,422~442,442~462

答案

答案:B

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