p(a and b) p(b and a ) 有区别么?统计学：公式：p(a and b)=p(a)*p(b/a)呢么p(b and a)是不是也等于p(a)*p(b/a)还是p(b)*p(a/b)?p(a and b) p(b and a ) 相等么?我算出来：P(a1 and b2)=P(b2 and a1) But p(B1 and A2) not = P(A2 and B1)
2019-05-03
p(a and b) p(b and a ) 有区别么?
统计学：公式：p(a and b)=p(a)*p(b/a)
呢么p(b and a)是不是也等于p(a)*p(b/a)还是p(b)*p(a/b)?
p(a and b) p(b and a ) 相等么?
我算出来：P(a1 and b2)=P(b2 and a1) But p(B1 and A2) not = P(A2 and B1)