位置24的问题 A stock had returns of 5 percent, 14 percent, 11 percent, −8 percent, and 6 percent over the past five years. What is the standard deviation of these returns?7.74%8.44%9.68%7.49%8.21%清除选择单项选择题

A

7.74%

B

8.44%

C

9.68%

D

7.49%

E

8.21%

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