ting the variance and standard deviation: Ben would like to invest in gold and is at the returns on such an investment can be quite volatile. Use the following table of states, ies, and returns to determine the expected return and the standard deviation of the -500% n on Ben's gold investment. Probability Return Boom Good OK Level Slump 0.1 40,00% 0.2 0.3 0.2 0.2 30.00% 15.00% 2.00% 12.00%