问题如下图:
选项:
A.
B.
C.
解释:
当good发生的时候neutral发生的概率应该是0.2。
那么这个joint probability怎么理解?
NO.PZ2015120604000074 The joint probability of having a gootoy' performanana neturnext y's performanis 0.70. The joint probability of having a gootoy' performanana neturnext y's performanis 0.20. A is correPAB=PA/B×PB A means neutrperformanB means gooeconomy Therefore, The joint probability of having a gootoy' performanana neturnext y's performanis 0.4×0.2=0.08 B 烦请老师仔细讲一下具体是怎么计算的,这个运算规则我没搞明白是怎么用在实际题目里的
这题应该选C吧?0.4*0.5
在今天是goo前提下,明天是neutral的概率是0.2,那不就是相当于今天goo明天neutral共同发生的概率吗?感觉这里的联合概率和条件概率是一样的,为什么不直接选0.2呢?
应该是0.3*0.3=0.09?