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The average annual return over the period 1886-2006 for stocks that comprise the S&P 500 is 8%, and the standard deviation of returns is 20%.
The average annual return over the period 1886-2006 for stocks that comprise the S&P 500 is 8%, and the standard deviation of returns is 20%. Based on these numbers what is a 95% confidence interval for 2007 returns? O A. - 16%, 24% OB. -17%, 33% O C. -32%, 48% OD. -22%, 38%
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