standard deviation formula
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Returns for the Shields Company over the last 3 years are shown below. What's the standard deviation of Shields' returns? (Hint: This is a sample, not a complete population, so the sample standard deviation formula should be used.)
Year
Return
2006
21.50%
2005
-12.50%
2004
24.20%
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Solution Summary
Apply the standard deviation formula for this case.
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