The best approach for creating a stratified random sample of a population involves:A.drawing an equal number of simple random samples from each subpopulation.B.selecting every kth member of the population until the desired sample size is reached.C.drawing simple random samples from each subpopulation in sizes proportional to the relative size of each subpopulation.老师AB为什么不对

这里公司 3 年期的另一只债券的风险溢价应该不等于 5 年期的风险溢价吧?这里要表达的意思是尽可能找 5 年期(与目标债券相同期限的),否则 3 年期虽然期限不同也可以使用是这样吗?

老师讲解一下这道题

存货减值，那cogs会增加吗，是减值算到cogs吗

罗伊第一比率越大越好吗？其中自己求的R是用获利除以自有资金？

A tree diagram is most likely used when dealing with investment problems that involve outcomes that are:A.mutually exclusive.B.independent at each node.C.unconditional at each node.老师这个二叉树哪个部分是无条件的哪个是独立的啊

股利支付不用减去吗

When working backward from the nodes on a binomial tree diagram, the analyst is most likely attempting to calculate:A.the number of potential outcomes.B.the probability of a given scenario.C.an expected value as of today.老师讲解一下这三个选项分别用于什么情况啊

为什么这道题我用计算器的data和stat算出的结果是a

怎么能用算出的61330调整成b选项啊，应该乘什么