倩仔 · 2023年05月24日
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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:
这种半方差 都默认算比标准值小的数吗？为什么这道题是小于2%而不是大于？
NO.PZ202106160300003005 问题如下 The target semi-viation of the returns over the 10 years if the target is 2% is closest to: A.1.42% B.1.50% C.2.01% B is correct. The target semi-viation is the square root of the sum of the squareviations from the target, vin-1: 如题，这个题都不知道从哪里入手，什么知识点，谢谢！
NO.PZ202106160300003005 问题如下 The target semi-viation of the returns over the 10 years if the target is 2% is closest to: A.1.42% B.1.50% C.2.01% B is correct. The target semi-viation is the square root of the sum of the squareviations from the target, vin-1: 题目从何判断表格是样本还是总体？
NO.PZ202106160300003005 问题如下 The target semi-viation of the returns over the 10 years if the target is 2% is closest to: A.1.42% B.1.50% C.2.01% B is correct. The target semi-viation is the square root of the sum of the squareviations from the target, vin-1: 这道题我不知道他单一的viation square怎么计算的，可以具体写一下单一的计算步骤吗？
NO.PZ202106160300003005 问题如下 The target semi-viation of the returns over the 10 years if the target is 2% is closest to: A.1.42% B.1.50% C.2.01% B is correct. The target semi-viation is the square root of the sum of the squareviations from the target, vin-1: harmonic 为什么要1+return？
