Compute the coefficient of variation (see Exercise 53) for the geometric, binomial, and Poisson distribution. Describe the behavior of the ore the behavior of the coefficients of variation when in the second case n is increasing; and in the third case λ is increasing.

Exercise 53

For any distribution with mean m ≠ 0 and standard deviation σ, the ratio σ/m is called a coefficient of variation (c.v.).