In: Finance
Problem 13-4 Coefficient of variation [LO13-1]
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 | Additional Sales in Units |
Probabilities | ||||
Ineffective campaign | 20 | 0.40 | ||||
Normal response | 110 | 0.40 | ||||
Extremely effective | 140 | 0.20 | ||||
Compute the coefficient of variation. (Do not round
intermediate calculations. Round your answer to 3 decimal
places.)
Expected sales=Respective sales*Respective probability
=(0.4*20)+(0.4*110)+(0.2*140)
=80
probability | Sales | probability*(Sales-Expected sales)^2 |
0.4 | 20 | 0.4*(20-80)^2=1440 |
0.4 | 110 | 0.4*(110-80)^2=360 |
0.2 | 140 | 0.2*(140-80)^2=720 |
Total=2520 |
Standard deviation=[Total probability*(Sales-Expected sales)^2/Total probability]^(1/2)
=(2520)^(1/2)
=50.2(Approx)
Coefficient of variation=Standard deviation/Expected sales
=50.2/80
=0.628(Approx)