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根据下表所示的股票回报率联合概率解答问题。股票回报率的联合概率表宏观经济状况宏观经济状况的概率股票业绩股票业绩的条件概率高涨 0.3 较好 0.5 适中 0.4 较差 0.1 平稳 0.1 较好 O.6 适中 0.3 较差 0.1 衰退 0.5 较好 0.2 适中 0.4 较差 0.4 Given that the stock has good performance, the probability the state of the economy was good is closest to:

A. 0.15
B. 0.27
C. 0.48

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根据下表所示的股票回报率联合概率解答问题。股票回报率的联合概率表宏观经济状况宏观经济状况的概率股票业绩股票业绩的条件概率高涨 0.3 较好 0.5 适中 0.4 较差 0.1 平稳 0.1 较好 O.6 适中 0.3 较差 0.1 衰退 0.5 较好 0.2 适中 0.4 较差 0.4 What is the total probability of having a good performance in the stock

A. 0.15
B. 0.31
C. 0.72

根据下表所示的股票回报率联合概率解答问题。股票回报率的联合概率表宏观经济状况宏观经济状况的概率股票业绩股票业绩的条件概率高涨 0.3 较好 0.5 适中 0.4 较差 0.1 平稳 0.1 较好 O.6 适中 0.3 较差 0.1 衰退 0.5 较好 0.2 适中 0.4 较差 0.4 What is the joint probability of having good stock performance in a neutral economic environment

A. 0.06
B. 0.10
C. 0.60

If an analyst estimates the probability of an event for which there is no historical record, this probability is best described as:

A. a prior probability.
B. a empirical probability.
C. a subjective probability.

Which of the following is most accurate regarding a distribution of returns that has a mean greater than its median

A. It is positively skewed.
B. It is a symmetric distribution.
C. It has positive excess of kurtosis.