34% 34% 2.35% 0.15% 13.5% 2.35% 13.5% 0.15% -3 -2 - u + +2 +30 x -3 -2 -1 0 1 2 1 2 3 A stock has averaged a return (mean) of 15% and a standard deviation of 10%. a. How often will your return be greater than 25%? b. How often will your return be less than -5%? c. How often will your return be greater than 15%? When it comes to investing, how is "risk" defined or measured