请大家解决一道数学题。
所有跟帖:
• 88% -noconfusion- ♂ (0 bytes) () 11/06/2010 postreply 18:12:55
• 如何算的?我感觉不到88%。 -trendspike- ♂ (0 bytes) () 11/06/2010 postreply 19:44:28
• probability 101 -noconfusion- ♂ (187 bytes) () 11/06/2010 postreply 20:00:03
• not really. what if one is wrong, another is correct and -pediatrician2- ♂ (73 bytes) () 11/06/2010 postreply 20:06:06
• the max is 88%, that happens if and only if -pediatrician2- ♂ (153 bytes) () 11/06/2010 postreply 20:08:08
• wait a minute -noconfusion- ♂ (231 bytes) () 11/06/2010 postreply 20:06:43
• 130/200 = 65% -pediatrician2- ♂ (0 bytes) () 11/06/2010 postreply 18:36:09
• 应该大于70%。因为其中一个方法是70%。第二个也大于50%。所以大于70%. -trendspike- ♂ (0 bytes) () 11/06/2010 postreply 19:45:49
• not necessary. when two methods disagree, you -pediatrician2- ♂ (193 bytes) () 11/06/2010 postreply 20:03:56
• 无解! :) 60%-88% maybe。 -pediatrician2- ♂ (0 bytes) () 11/06/2010 postreply 18:59:40
• 60%*70% = 42% -东门庆- ♂ (0 bytes) () 11/06/2010 postreply 19:01:10
• 肯定不对。应该大于70%。 -trendspike- ♂ (0 bytes) () 11/06/2010 postreply 19:44:56
• 按照你自己定义的必须两法都positive, 东门庆就是对的。 -万枫- ♂ (0 bytes) () 11/07/2010 postreply 05:55:28
• 88%, 详解见内 -北美老农- ♂ (28 bytes) () 11/06/2010 postreply 19:52:03
• suppose method A is 50%, method B is 100% (you do not know it is -pediatrician2- ♂ (204 bytes) () 11/06/2010 postreply 20:21:19
• 回复:请大家解决一道数学题。 -tmp32990- ♂ (349 bytes) () 11/06/2010 postreply 20:29:44
• 同时使用,就是两个方法都Positive的预测。 -trendspike- ♂ (0 bytes) () 11/06/2010 postreply 21:03:41
• 你的对的概率是在42%-88%之间 -静观者- ♀ (409 bytes) () 11/06/2010 postreply 21:03:23
• 都说中国人数学好,看来未必 -85858585- ♀ (140 bytes) () 11/06/2010 postreply 21:21:59
• 两法并联使用:42%;串联使用88% -万枫- ♂ (694 bytes) () 11/07/2010 postreply 04:27:41
• correlation 呢? -729418- ♀ (0 bytes) () 11/07/2010 postreply 07:24:52
• 88% if user only acts when A and B agree. When A and B disagree -Planotx- ♂ (535 bytes) () 11/07/2010 postreply 08:03:39
• 你该复习一下概率课程了,都还给老师了,嗬嗬! -万枫- ♂ (0 bytes) () 11/07/2010 postreply 08:35:00
• 回复:你该复习一下概率课程了,都还给老师了,嗬嗬! -planotx- ♂ (200 bytes) () 11/07/2010 postreply 08:54:26
• A and B agree的概率怎么会是88%? 这两法重叠(agree)的部分只有42% -万枫- ♂ (213 bytes) () 11/07/2010 postreply 09:25:47
• The probablity of A and B agree is 0.6*0.7 + 0.3*0.4 = .54 (54%) -planotx- ♂ (64 bytes) () 11/07/2010 postreply 10:14:45
• I need to correct that if A and B agree, the correct chance is 7 -planotx- ♂ (0 bytes) () 11/07/2010 postreply 10:21:01
• 那也不会是88%呀 -万枫- ♂ (0 bytes) () 11/07/2010 postreply 11:58:52
• yes, you are right. My post was cut -planotx- ♂ (167 bytes) () 11/07/2010 postreply 14:31:55
• 注意:准确率不是一致率,12%是两法都错误的概率,不应该加到准确率里 -万枫- ♂ (0 bytes) () 11/07/2010 postreply 12:01:36
• Assuming A=60% and B=70% if the result -WhoCaresWhoYouAre- ♀ (132 bytes) () 11/07/2010 postreply 16:21:15
• 70% -suqigai- ♂ (38 bytes) () 11/08/2010 postreply 13:29:37