Ruth is considering investing in a company's stock and is aware that the return on that investment is particularly sensitive to how the economy is performing. Her analysis suggests that four states of the economy can affect the return on the investment. Use the following table of returns and probabilities to determine the coefficient of variation for the investment. (Round answer to 5 decimal places, e.g. 0.07680.) Probability Return Boom 0.2 25.00% Good 0.1 15.00% Level 0.1 10.00% Slump 0.6 -5.00% Coefficient of variation