The following 10 observations are a sample drawn from a normal population: 25, 20, 18, –5, 35, 21, –11, 8, 20, and 9. The fourth quintile (80th percentile) of the sample is closest to: A 24. B 8. C 21. 这题为什么不用（n+1）*80*=8.8，在数第八和第九之间那样做呢？

请解释一下

为什么不选B？

household wealth中文怎么理解

这个知识点在哪里

这个知识点请老师在讲一下。holder和writer有什么区别怎么区分对应的right和obligation

Which of the following industry is most likely to earn economic profits? A Firms in an industry that is characterized by low threat of substitute products and high rivalry among existing competitors. B Firms in an industry that is characterized by high barriers to entry and low bargaining power of buyers. C Firms in an industry that is characterized by high bargaining power of suppliers and low threat of new entrants. 这道题答案是b，有点不理解，对客户没有定价权哪还有超额利润

Company AAA issues 10-year bonds on 1 January 2013, the bonds are priced at ￡107,306 with face value 100,000, market interest rates are 6%, coupon rates are 7%, interest paid annually on 31 December. The carrying value of the bonds as of 31 December 2013 will be closest to: A ￡5,301,000. B ￡5,316,000. C ￡4,695,000. 这题答案给错了吧？

请问HC, A.D., carrying value都是Asset下列出的account吗？

Which of the following situation will most likely result in a decrease in a valuation allowance for a deferred tax asset under U.S. GAAP? If: A Tax rates reduce. B The tax loss carry-forward period extends over a period of time C Interest rates decrease 这道题在考察什么？