Consider a bond fund with annual expected returns of 4% and standard deviation 4%. Assume the returns are normally distributed. What's the probability that the fund will have positive returns in any single year? For a normal distribution: 68% of observations are expected in the confidence interval of one standard deviation up and down from the mean. 95% of observations are expected in the confidence interval of two standard deviations up and down from the mean. 99% of observations are expected in the confidence interval of three standard deviations up and down from the mean. 50% 68% 84% Impossible to tell with given information