Al Bundy is evaluating a new advertising program that could increase shoe sales. Possible outcomes and probabilities of the outcomes are shown next Possible Outcomes Ineffective campaign Normal response Extremely effective Additional Sales in Units Probabilities 80 0.20 140 0.40 320 0.40 Compute the coefficient of variation (Do not round Intermediate calculations. Round your answer to 3 decimal places.) Answer is complete but not entirely correct. Coefficient of variation 0.5143