NO.PZ202106160300003004
问题如下:
The standard deviation of the 10 years of returns is closest to:
选项:
A. 2.40%
B. 2.53%
C. 7.58%
解释:
B is Correct.
The standard deviation is the square root of the sum of the squared deviations divided by n-1
样本和整体怎么去区分