We are looking to find P(G/U), the probability the economy grows given that ABC stock is up. P(G) probability the economy grows = 0.50 P(R) = probability of a recession 0.50 P(U/G) = probability the stock is up given the economy grows = 0.60 P(U/R) = probability the stock is up given the economy goes into a recession = 0.15 Using Bayes’ formula: P(G/U) = P(G)* P(UIC)/[P(C) P(UIG) P(R) P(U/R) P(G/U) = (0.50) * (0.60)/[(0.50)(0.60) (0.50)(0.15) P(G/U) = 0.3/0.375 = 0.8 = 80.0% 没有看懂

on a single coin toss是抛一次硬币的意思吗？ 为什么是求平均价值呢？ 为什么求平均价值就是全部相加呢？

According to Bayes' formula: P(B/default) = P(default and B)/P(default) P(default and B ) = P(default/B)×P(B) = 0.250×0.300 = 0.075 P(default and CCC) = P(default/CCC)×P(CCC) = 0.400×0.700 = 0.280 P(default) = P(default and B) P(default and CCC) = 0.355 P(B/default) = P(default and B)/P(default) = 0.075/0.355 = 0.211 没有看懂

e的负数指数是什么意思呢

7次方怎么在计算器按出来

老师计算器小数后几位可以调吗，怎么调

老师 （1 2|r）2=1.05 等号左边用计算器怎么按啊

这个PPT里的s.t.是什么意思啊？

1.无穷分之一等于0是为什么啊？ 2.无穷分之一不停的加，怎么不是无穷个0相加，最后不应该等于0嘛？

Significance level 是什么意思？是不是confidence intervel的补集？