AK Steel's stocks had returns of 9 percent, -16 percent, 18 percent, and 14 percent for four
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Question:
AK Steel's stocks had returns of 9 percent, -16 percent, 18 percent, and 14 percent for four of the last five years. The average return of the stock over this period was 10.3 percent. What is the standard deviation of the stock's returns?
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