摩羯大小姐 · 2022年01月15日
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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
计算器里有sx 和 sigma 什么时候用哪个呢
NO.PZ202106160300003004 问题如下 The stanrviation of the 10 years of returns is closest to: A.2.40% B.2.53% C.7.58% B is Correct. The stanrviation is the square root of the sum of the squareviations vin-1 如题
NO.PZ202106160300003004 问题如下 The stanrviation of the 10 years of returns is closest to: A.2.40% B.2.53% C.7.58% B is Correct. The stanrviation is the square root of the sum of the squareviations vin-1 RT，谢谢
NO.PZ202106160300003004 如题。。。。。。。。。
NO.PZ202106160300003004样本和整体怎么去区分
