陆佳莹 · 2021年08月25日
NO.PZ2015120604000126
问题如下：
Which of the following statements refers to survivorship bias?
选项：
A. Use datas of stratified equity sampling.
B. Use point estimation method instead of interval estimation method
C. Use historical datas of hedgel fund performance.
解释：
C is correct.
In the study of hedge fund performance, survivorship bias is most likely to occur because only funds with better performance remain alive.
在对冲基金业绩的研究中，幸存者偏差最有可能发生，因为只有表现更好的基金才能存活下来。
为啥不选B呢？希望老师解释一下
NO.PZ2015120604000126 问题如下 Whiof the following statements refers to survivorship bias? A.Use ta of stratifieequity sampling. B.Use point estimation methoinsteof intervestimation metho C.Use historicta of heel funperformance. C is correct.In the stu of hee funperformance, survivorship biis most likely to occur because only fun with better performanremain alive.在对冲基金业绩的研究中，幸存者偏差最有可能发生，因为只有表现更好的基金才能存活下来。 但对冲基金的历史数据，不一定就表明他是剩下的数据呀。那就像老师举的例子，我取前十年、前9年的数据，每次都是历史数据，那怎么能说是活着的对冲基金呢？
Use point estimation methoinsteof intervestimation methoUse historictof heel funperformance. C is correct. In the stu of hee funperformance, survivorship biis most likely to occur because only fun with better performanremain alive.请问下，A使用分层数据不就是数据选取的有偏差吗?
老师您好，可以说一下ab两个分别是哪两个知识点吗？谢谢
A B 可以帮忙翻译下不多谢
