题目里说to notify clients of the changes, 这也不算及时也客户交流么？

这题为什么不选B？

根据short put和 long call的payoff图为什么能得出风险敞口为long?

这道题说 with a sample standard deviation of 12 hours， 可以算是方差未知吗？

This process is used to estimate the population mean and standard deviation, which usually are unknown. 这题答案里的这句话是不是有错？老师说符合中心极限定理的条件是 known mean and known standard deviation.

P-value中是不是不考虑单双尾检验，只需比较P-value和α的大小即可？

这题解体过程为什么不是12-5=7（nominal rate - inflation = real rate）,7-3=4 (real rate - risk free rate = risk premium)?

F(21) = 1.00 The probability density function for a continuous uniform distribution is calculated as follows: F(X) = (X – a) / (b – a), where a and b are the lower and upper endpoints, respectively. (If the given X is greater than the upper limit, the probability is 1.0.) , 如果below the lower endpoint ，概率是多少?

為什麼組合排列 is least likely to describe the way of calculating the number of labelling

Since Hillbillies’ correlation coefficient with the existing portfolio is less than 1, there are benefits to diversification, and adding it to the existing portfolio would reduce the variance below the current level of 0.024. 为什么hillbillies的correlation=0.38会导致existing portfolio would reduce the variance below the current level of 0.024？