在一次数学考试中,随机抽取100名同学的成绩作为一个样本,其成绩

在一次数学考试中,随机抽取100名同学的成绩作为一个样本,其成绩的分布情况如下:

成绩

人数分布

9

18

23

27

15

8

    则该样本中成绩在内的频率为      

答案

0.23       

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