已知一个样本:23,24,25,26,26,27,27,27,27,27,28,28,28,29,29,30,30,31,31,32,那么频数为8的范围是____ 26.5-28.5
已知一个样本:27,23,25,27,29,31,27,30,32,28,31,28,26,27,29,28,24,26,27,30那么频数为8 的范围是( ) A .24.5- 26.5 B.26-28.5 C.28-30.5 D.30-32.5 (选B 27的频数+28的频数=5+3=8) 题文
题型:解答题难度 答案
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