philsonzhao 发表于 2013-7-25 15:24 张厚灿书上写的是 数据是负偏态时 M
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lansefei 发表于 2013-7-25 00:59 总分,100分,20个人的分数 1,1,1,1,,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100
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