# standard deviation formula

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%

https://brainmass.com/economics/finance/standard-deviation-formula-195000

#### Solution Summary

Apply the standard deviation formula for this case.

$2.19