【每日一练】CFA 一级（2015年）

Question：

In setting the confidence interval for the population mean of a normal or approximately normal distribution, and given that the sample size is small, Student's t-distribution is the most appropriate approach when the variance is: 
A. unknown. 
B. large. 
C. known. 

Answer = A 
When the sample size is small (and the population is normally or approximately normally distributed), the Student's t-distribution is preferred if the variance is unknown. 

CFA Level I 
"Sampling and Estimation," Richard A. DeFusco, Dennis W. McLeavey, Jerald E. Pinto, and David E. 
Runkle 
Section 4.2 

更多精彩：

这可能是目前zui快通过CFA、FRM双证的捷径了

通过CFA一级需要花费多长时间？