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Assume a normal population with a population variance of 8. In a random sample of size 20 the propability of obtaining a sample variance as large or larger than 16.253 is roughly?


来自iPhone客户端1楼2013-10-28 13:07回复
    有没有大神帮解答一下啊 感激不尽


    来自iPhone客户端2楼2013-10-28 13:12
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      2026-10-17 10:55:53
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      题意大概是 总体的方差为8。从总体中随机抽取一个20个样本容量的方差大于16.253的可能性有多大


      来自iPhone客户端3楼2013-10-28 13:16
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