這道題答案是C，錯選了A。成對數檢驗難道不是看差額么？另外C選項分母里面的x1和x2又是什么？題目中沒給出來啊，即使我沒選A也可能會選到B。。。請老師解答。
請教一題：If a stock decreases in one period and then increases by an equal dollar amount in the next period, will the respective arithmetic average of the continuously compounded and holding period rates of return be positive, negative, or zero?答案是zero；positive。拿算術平均舉例：假設stock P=100，第一期價格跌10塊，第二期價格漲10塊。第一期收益率-10%，第二期收益率11.11%，為啥是0？
麻煩老師解答一下
An analyst determines that approximately 99% of the observations of daily sales for a company are within the interval from $230,000 to $480,000 and that daily sales for the company are normally distributed. If approximately 99% of all the observations fall in the interval μ±3σ, then using the approximate z-value rather than the precise table, the standard deviation of daily sales for the company is closest to: A $83,333. B $62,500. C $41,667. 一點思路都沒有
An investor invested $10,000 into an account five years ago. Today, the account value is $18,682. What is the investor's annual rate of return on a continuously compounded basis? A 12.50%. B 11.33%. C 13.31%. 什么是 a continuously compounded basis?
If the price of a stock goes from $15.00 to $16.20 in one year, the continuously compounded rate of return is closest to: A 8.33%. B 7.70%. C 8.00%.、 這題答案沒錯？？？？
老師 麻煩您詳細解釋一下這三道題目。根據單老師的解題思路，首先lien/mortgage最優(yōu)，然后判斷senior＞subordinate，最后判斷secured＞unsecured。按照這三個順序判斷，為什么答案都錯了？
The term that describes when inflation declines but nonetheless remains at a positive level is: A deflation. B stagflation. C disinflation. 這題選c？不太明白
老師好，這道題不是很理解。
老師，是題中本身capital gain distribution, 就是一種有問題的說法嗎？那種利得屬于capital gain distribution呢？麻煩能舉例嗎？
請解釋一下
Using historical data that was not publicly available at the time period being studied will have a sample with: A Look-ahead bias. B Sample selection bias C Data-mining bias. 這題答案對嗎？不應該是前視偏差吧，他確實用的歷史數據，只是不公開，能舉幾個具體例子嗎？老師課上講的范圍很大，
A sample of 100 observations drawn from a normally distributed population has a sample mean of 12 and a sample standard deviation of 4. Using the extract from the z-distribution given below, find the 95% confidence interval for the population mean. The 95% confidence interval is closest to: A 7.840 to 27.683 B 11.216 to 12.784 C 11.340 to 12.660 什么時候用12+1.96*4，什么時候用12+1.96*4/100根號下呢？
老師，為什么說crossover rate 就是Npv相等 而不是irr 也相等呢？
答案是B，我選的是C，這題其實不太會選，沒太理解題目
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