栾同学2020-06-22 23:07:44
老师我不是很懂6.18的概念。If it says both probabilities are less than 0.5, the only reason I could think of is due to diversification. But what is that 0.29 about? How did they come up with that number?
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Adam2020-06-24 15:49:07
同学你好,
这里说的是XY取值要么是0要么是1,
当XY均小于0.5时,也就是都取0,正常来说如果二者不相关概率应该为1/2*1*2=0.25,但是二者存在相关性,所以概率会不一样。这个0.29是二元正太分布算出来的。理解一下就可以
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