For the period of 2009 to 2014, the returns to the S&P 500 Index were: 23.5%, 12.8%, 0.0%, 13.4%, 29.6%, 11.4%. Compute the standard deviation of annual returns for this period for the S&P 500 Index. O 10.3% None of these are correct. O 12.2% O 19.5% O 16.5%

For the period of 2009 to 2014 , the returns to the S\&P 500 Index were: 23.5%,12.8%,0.0%,13.4%, 29.6%,11.4%. Compute the standard deviation of annual returns for this period for the S\&P 500 Index. 10.3% None of these are correct. 12.2% 19.5% 16.5%