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The average annual return over the period 1886-2006 for stocks that comprise the S&P 500 is 15%, and the standard deviation of retums is 20%.
The average annual return over the period 1886-2006 for stocks that comprise the S&P 500 is 15%, and the standard deviation of retums is 20%. Based on these numbers what is a 95% confidence interval for 2007 returns? A. -15%, 45% OB.- 10%, 40% Oc. -12.5%, 27.5% D. -25%, 55%
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