4 pts Tommie has made an investment that will generate returns that are based on the state of the economy during the year. Use the following information to calculate the standard deviation of the return distribution for Tommie's investment. (Do not round intermediate computations. Round your final answer to four decimal places.) State Return Weak Probability 0.13 OK 0.30 0.20 Great 0.40 0.25 0.30 0 0.0495 O 0.0453 0.0481 O 0.0467