请问这些个rate该如何区分？

不能直接乘修正久期吗？

卖出的存货的收入在资产负债表里记在哪里，这里的cogs指的是在利润表里的吧？

为什么价格上涨，利率也会上涨

Find the reliability factors based on the t-distribution for the following confidence intervals for the population mean (df = degrees of freedom, n = sample size): A.A 99% confidence interval, df = 20 A 90% confidence interval, df = 20 C. A 95% confidence interval, n = 25 D. A 95% confidence interval, n = 16 A. For a 99% confidence interval, the reliability factor we use is t0.005; for df = 20, this factor is 2.845. B. For a 90% confidence interval, the reliability factor we use is t0.05; for df = 20, this factor is 1.725. C. Degrees of freedom equals n − 1, or in this case 25 − 1 = 24. For a 95% confidence interval, the reliability factor we use is t0.025; for df = 24, this factor is 2.064. D. Degrees of freedom equals 16 − 1 = 15. For a 95% confidence interval, the reliability factor we use is t0.025; for df = 15, this factor is 2.13 课后答案中的t0.005 t0.05 t.0.025 t0.025这几个数是怎么来的？

老师这个题不理解

老师这个题目能不能讲一下

老师这个题BC，是不是说单边大于benchmark是相对收益目标，而有大于也有小于这种双边的是相对风险目标

老师这个题能不能讲一下，不明白怎么考虑

这到提为什么不能选A两个都投资？项目2是更好，但是1也是正的NPV呀