Tunnelston Company is considering a proposal to introduce a new product, XPL. An outside marketing consultant prepared the following probability distribution describing the relative likelihood of monthly sales volume levels and related income (loss) of XPL:

Required:
(1) Compute the expected income or loss (expected value).
(2) Compute the standard deviation and the coefficient of variation.

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Monthly Sales Volume 3,000 6,000 9,000 12,000 15,000 Probability .05 .15 40 .30 .10 Income Loss) $(35,000) 5,000 30,000 50,000 70,000