作者daze (宁鸣而死不默而生)
看板Statistics
标题[问题] 从常态分配中抽样的期望值？
时间Fri Aug 17 12:28:13 2007
考虑一个常态分配的母体
从中抽n个样本
取其中最大的m个作平均
期望值会是多少？
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