Variance and standard deviation (expected). Hull Consultants, a famous think tank in the Midwest, has provided probability estimates for the four potential economic states for the coming year. The probability of a boom economy is 10%, the probability of a stable growth economy is 18%, the probability of a stagnant economy is 53%, and the probability of a recession is 19%. Calculate the variance and the standard deviation stock? Investment Boom Forecasted Returns for Each Economy Stable Stagnant Growth 15% 3% 8% 5% 7% 4% Stock Corporate bond Government bond 27% 10% Recession - 12% 4% 3% 9% What is the variance of the stock investment? % (Round to five decimal places.) What is the standard deviation of the stock investment? % (Round to two decimal places.)