An analyst does research about standard deviation and gathers the following information

发布时间：2021-04-12 12:47:40

单项选择题:
An analyst does research about standard deviation and gathers the following information about two scenarios:Scenario Probability Expected rate of return
A 0.40 -5%
B 0.60 10%
The expected standard deviation is closest to:（）
A. 5.29% B. 7.35% C. 8.57%

网友回答

答案：B
　　解析: 平均回报=0.40×(-5%)+0.60×10%=4%； 标准差：[0.40×(-5%-4%)2+0.60×(10%-4%)2]1/2=7.35%。
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