Northern Wind Power, a new age energy company, is considering the introduction of a product intended to use wind as an energy-producing device. The possible levels of unit sales and the probabilities of occurrence are given.

Acceptance Potential Sales in Units Probabilities

Low 50 0.50

Moderate 80 0.30

Strong 100 0.10

Very Strong 110 0.10

a.What is the expected value of unit sales for the new product?

Expected value

b.What is the standard deviation of unit sales?(Do not round intermediate calculations.Round the final answer to 2 decimal places.)

Standard deviation