Answer: 9.35 percent, 2.76 percent, and 0.295, respectively
Explanation:
Expected value;
This is a weighted average of the different possibilities.
= (0.25 * 5%) + (0.55 * 10%) + (0.20 * 13%)
= 9.35%
Standard Deviation:
First calculate Variance
Variance = (0.25 * (5 - 9.35)²) + (0.55 * (10 - 9.35)²) + (0.20 * (13 - 9.35)²)
= 7.62%
Standard deviation = √7.62%
= 2.76%
Coefficient of Variation
= Standard deviation/ Expected value
= 2.76%/9.35%
=0.295
