NO.PZ202106160300003005
问题如下:
The target semi-deviation of the returns over the 10 years if the target is 2% is closest to:
选项:
A.1.42% B.1.50% C.2.01%解释:
B is correct.
The target semi-deviation is the square root of the sum of the squared deviations from the target, divided by n-1:
为什么要开根号?