那就是老师口误咯？为啥老师总说不一定独立，写得又是一定不独立？到底说的啥？

数量，reading8，多元回归的条件异方差问题。 “条件异方差会带来问题，使得第一类错误概率上升，即拒真可能性上升”的解释，没有看懂。 见截图中红框（单老师讲义第51页），为什么当分子中b1 cap上升，分母中Sb1 cap同时上升，检验统计量t的数值是上升的？请教老师，感谢！

请问corporate finance这一节，是不是新的课程里删了？

04.单选题 已收藏 标记 纠错 In using matrix pricing to estimate the required yield spread on a newly-issued corporate bond, we choose what kind of rate as benchmark rate? A YTM on a corporate bond with similar credit risk and time to maturity. B YTM on a government bond with a similar time to maturity. C coupon rate on a government bond with a similar time to maturity. 查看解析 上一题 提交试卷 正确答案B 您的答案A本题平均正确率：47% Matrix pricing;难度：一般 推荐：      答案解析 The benchmark rate is the yield to maturity on a government bond with the same, or similar, time to maturity. 问：是不是用我图中的原理来估 x公司的 ytm的？等于还是相似三角形？但是横轴的时间周期不好解释，还是您解释一下把？

02.单选题 已收藏 标记 纠错 Matrix pricing can be used to estimate which of the following when underwrite new corporate bonds: A Required yield spread over the benchmark rate. B Market discount rate of other comparable corporate bonds. C Yield-to-maturity on a government bond having a similar time-to-maturity. 查看解析 上一题 下一题 正确答案A 您的答案A本题平均正确率：49% Matrix pricing;难度：一般 推荐：      答案解析 Matrix pricing is used in underwriting new bonds to get an estimate of the required yield spread over the benchmark rate. The benchmark rate is typically the yield-to-maturity on a government bond having the same, or close to the same, time-to-maturity. The spread is the difference between the yield-to-maturity on the new bond and the benchmark rate. The yield spread is the additional compensation required by investors for the difference in the credit risk, liquidity risk, and tax status of the bond relative to the government bond. 问：除了视频里讲的相似三角形法，这里还说了A 可以估利差 spread ，可否简单举例说明？貌似没有讲过

课后题readong30第31题，应付账款为什么符号是正，导致WC增加数为-1200。谢谢老师。

第14题

第12题

35题

第15题