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An investment produced annual rates of return of 7%,14%, 20% and 4% respectively over the past four years. What is the standard deviation of these
An investment produced annual rates of return of 7%,14%,
20% and 4% respectively over the past four years. What is the standard deviation of these returns?
A.
12.1%
B.
7.0%
C.
1.5%
D.
14.0%
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