備考CFA考試是不是掌握了CFA知識？CFA考試題是不是已經(jīng)做好了？是不是掌握了考試題？能在規(guī)定的時間內(nèi)將CFA考試題做對？這在考試中是很重要的，需要考生在備考中加強練習的，有需要跟著小編一起看看吧！

A sample of 240 managed portfolios has a mean annual return of 0.11 and a standard deviation of returns of 0.23. The standard error of the sample mean is closest to:

A. 0.01485.

B. 0.00096.

C. 0.00710.

解析：選A。樣本標準誤 = 總體標準差 / 樣本量的平方根 = 0.23 / (240)^0.5 = 0.01485

A fund manager would like to estimate the probability of a daily loss higher than 5% on the fund he manages. He decides to use a method that uses the relative frequency of occurrence based on historical data. The resulting probability is best described as a(n):


A. subjective probability.

B. a priori probability.

C. empirical probability.

解析：選C。要區(qū)分幾種概率的定義：

經(jīng)驗概率(empirical probability)：根據(jù)歷史數(shù)據(jù)來估計

先驗概率(priori probability)：通過對問題的推理來推斷出概率

其中，經(jīng)驗概率與先驗概率屬于客觀概率(objective probabilities)

主觀概率(subjective probability)：基于個人或主觀判斷

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