【每日一练】CFA 一级（2015年）

Question：

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. 0.00096. 
B. 0.00710. 
C. 0.01485. 
Answer = C 
For a sample, the standard error of the mean is where s is the sample standard deviation and n is the sample size), which here is: 0.23/√240 = 0.01485.

CFA Level I 
"Sampling and Estimation," Richard A. DeFusco, Dennis W. McLeavey, Jerald E. Pinto, and David E. 
Runkle 
Section 3.1 

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CFA和FRM的区别

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