20题为什么是非参数检验。 22题为什么选b，c选项显著性水平不是两边拒绝域的面积吗不正是拒绝原假设的意思吗

when the price level increases along the aggregate demand curve,which of the following items is less likely to decrease?A the income. B the money supply. C the interest rate 怎么分析？有点晕

It manages part of the equity portfolio in-house and delegates management of the balance to super trust company.as chief investment officer, you want to review the performance of the in-house and super trust portfolios over the last four quarters. you have arranged for outflows and inflows to the portfolios to be made at the very beginning of the quarter. Table 5 summarizes the inflows and outflows as well as the two portfolios' valuations. In the table, the ending value is the portfolio's value just prior to the cash inflow or outflow at the beginning of the quarter.The amount invested is the amount each portfolio manager is responsible for investing. 题目中最后两句没读懂，每季度的终值是ending value,初值为什么是amount invested而不是beginning value或beginning of period inflow(outflow)?

关于covariance Matrix的图标计算逻辑 不懂，不太通矩阵的运算规律和意义 学这节的时候 听不懂

老师，这道题没听懂~FIFO反映的是estimate of Inventory value，那么Assets不是应该是高吗？为什么反而A是错的，不是too high

initial investment cost 包括卖出股票时的佣金？

为什么不能说接受原假设，而要说fail to reject

视频最后说出租人的direct financing lease的收入前高后低，但是没说sales-type好像，一样吗？

原假设和备择假设是不是互补关系

老师，请问这道题不是在问最不正确的么？least accurate?