作者clonn (clonn)
看板NUU_IM
标题Re: [讨论] 统计作业
时间Fri Nov 30 00:29:21 2007
※ 引述《northfox (茧居狐(我不是宅~是腐XD))》之铭言:
: 我来认真一下好了
: 先PO题目(统计ch6)
: Afinancial analyst has determined that there is an 18%
: probability that a mutual fund will outperform the market
: over a 1-year period provided that it outperformed
: the market the previous year. If only 15% of mutual funds
: outperform the market during any year, what is the probability
: that a mutual fund will outperform the market 2 years in a row?
: 请知道的大大推文回覆 谢谢....
: ...........................开玩笑的
财金分析,如果你预备一年期间投资会比没有准备进场还要高18%赢的机率
如果只有15%一年内的投资报酬率
那两年内的话,会有什麽情况
我想: 0.18 + 0.82*0.15 <=MY 解答
0.18 准备一年以後进场
0.82*0.15 毫无准备进场
而每一年机率相同
SO~我想相加起来应该就是答案
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 125.231.32.60
1F:→ clonn:我个人是这样子觉得啦 11/30 00:44
2F:推 northfox:你怎麽po答案了…这样…我就没练习到了呀~(泪奔) 11/30 01:34
3F:→ northfox:不过有题目真好 我看懂了orz 11/30 01:34
4F:→ northfox:所以IN A ROW是指"照这样下去两年内#$*#&~"的意思吗? 11/30 01:35
5F:推 clonn:in a row是只在一列中 所以我也不敢确定 只是推测 12/01 01:50
6F:推 clonn:可以跟学弟妹们对伊下答案 我现在也在统计中 12/01 01:52