【每日一练】CFA 一级(2015年)
Question:
A sample of 25 observations has a mean of 8 and a standard deviation of 15. The standard error of the sample mean is closest to:
A. 1.60.
B. 3.00.
C. 3.06.
Answer = B
The standard error of the sample mean, when the sample standard deviation is known, is:
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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