What is the standard deviation of the returns on $16,000 portfolio which consists of stocks S and T? Stock T is valued at $7,000. Returns if State Occurs Probability of State of State of Economy Economy Stock S Stock T Boom 10% 15% 19% Normal 90% 11% 7% 1.15 percent 3.44 percent 2.25 percent 1.38 percent 3.12 percent