NO.PZ2022123001000031
问题如下:
A fund had the following experience over the past 10 years:
The target semideviation 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:
The target semi-deviation is the square root of the sum of the squared deviations from the target, divided by n − 1:
代入公式后得到:(0.5%的平方+4%的平方+2%的平方)/9,然后再开方。想请问下,计算器计算上述式子中的分子(三个百分数的平方和)是什么按键顺序呢? 我这边总是算出0.0025%。谢谢!