作者amay0620 (抒情摇滚)
看板Statistics
标题[问题] 一题统计
时间Wed Mar 12 00:38:49 2008
what is the probability of obtaining exactly one defective tire form a sample
of 20 if 8% of the tires manufactured at a particular plant are defective?
a) 0.284 b)0.323 c)0.3351 d)0.3414 e)0.3472
我的解法是 C20取1*(0.08)*(0.92)^(19)=0.3282 (没有答案选)
请强者指点迷津....还是我的算法是不对的?
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◆ From: 61.229.93.3
1F：→ physmd:用Poisson? 03/12 01:22
2F：→ amay0620:酷!用poisson可以得到0.323B的答案 03/12 02:14
3F：推 LiamIssac:poisson approximation 03/12 09:19