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 11%, the probability of a stable growth economy is 17%, the probability of a stagnant economy is 49%, and the probability of a recession is 23% Calculate the variance and the standard deviation stock? Investment Forecasted Returns for Each Economy Stable Stagnant Growth Boom Recession 126 5% Stock Corporate bond Government bond 22% 10% 91% 5% 0% 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)