A stock had returns of 8%,-2%,4%,and 16% over the past four years. What is the standard deviation of this stock for the past four years?
A) 6.3%
B) 6.6%
C) 7.1%
D) 7.5%
E) 7.9%

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The Answer of A stock had returns of 8%,-2%,4%,and 16% over the past four years. What is the standard deviation of this stock for the past four years?
A) 6.3%
B) 6.6%
C) 7.1%
D) 7.5%
E) 7.9%

A Stock Had Returns of 8%,-2%,4%,and 16% Over the Past