What is the lower range of the expected return using standard deviation?

Economy Probability Return

Strong 25% 20%

Normal 60% 8%

Weak 15% -15%

Question 19 5 pts What is the lower range of the expected return using standard deviation? Economy Probability Return Strong 25% 20% Normal 60% 8% Weak 15% -15% 0.93% 10.73% 0 - 3.18% 6.40%