Sampson Corp. is evaluating the introduction of a new product. The possible levels of unit sales and the probabilities of their occurrence are shown next: Possible Market Reaction Low response Moderate response High response Very high response Sales in Units 30 50 75 90 Probabilities . 10 20 40 30 a. What is the expected value of unit sales for the new product? (Do not round intermediate calculations and round your answer to the nearest whole unit.) Expected value units b. What is the standard deviation of unit sales? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Standard deviation units Shack Homebuilders Limited is evaluating a new promotional campaign that could increase home sales. Possible outcomes and probabilities of the outcomes are shown next. Possible Outcomes Ineffective campaign Normal response Extremely effective Additional Sales in Units 40 100 120 Probabilities 30 30 40 Compute the coefficient of variation. (Do not round intermediate calculations. Round your answer to 3 decimal places.) Coefficient of variation