C选项还是不太能理解

老师考试的时候会给卡方分布表吗，不然也不知道5%对应的是5.99啊，还有查表格的时候，为啥n=2啊？

A firm is concerned about potential increases in the federal funds rate and their impact on the S&P 500. For a 3-month forecast period, the firm’s economics team estimates the following: A 60% probability that the Federal Reserve will not raise the federal funds rate. A 32% probability that the return on the S&P 500 will be between -10% and +10%. A 38% chance that the return on the S&P 500 will be less than -10%. A 24% joint probability that the return on the S&P 500 will be greater than 10% and that the Federal Reserve will not raise the federal funds rate. Based on the estimates above, given that the Federal Reserve raises the federal funds rate, what is the probability that the return on the S&P 500 is greater than 10%? A 10%. B 15%. C 20%. D 40%.

用计算器DATA STAT算出来的r *SX*SY 为什么结果不对？

Reusing sets of random number draws across Monte Carlo experiments decreases the estimate variability across experiments by using the same set of random numbers for each simulation.这句话为什么对？

A control variate involves replacing a variable x (under simulation) that has known properties with a similar variable y that has unknown properties.这句话什么意思？

老师可以讲解一下这道题的详细思路和解题过程吗，以及这道题中对应CTD公式的哪一块，

老师A选项中只要daily是服从正态分布的话，那么daily的var就可以计算，从而不就可以用平方根法则算出来weekly的var了吗？这样看A也不是错的啊

老师您好 百题77题能否解释下为啥选B嘛

第13题中的B选项，SML只考虑系统性风险，是因为资产都被充分分散且有效的，而CML是考虑系统风险和非系统风险的，那从这个角度看，SML不是CML的特殊情况吗？就是CML中的资产充分分散化后就无非系统风险了就变成SML中的只考虑系统性风险的资产组合吗？