If X∼Uniform(a,b)X \sim \text{Uniform}(a, b)X∼Uniform(a,b), what is the coefficient of variation CV=σ/μCV = \sigma/\muCV=σ/μ?
b−a3(a+b)\frac{b-a}{\sqrt{3}(a+b)}3(a+b)b−a
b−a12(a+b)\frac{b-a}{\sqrt{12}(a+b)}12(a+b)b−a
b−a3(b+a)\frac{b-a}{\sqrt{3}(b+a)}3(b+a)b−a
a+b12(b−a)\frac{a+b}{\sqrt{12}(b-a)}12(b−a)a+b