ρ = (σ^2 + β^2) / (2 \* π \* r^2)
ρ: Sprinkle Stability Index
σ: Standard Deviation
β: Coefficient of Variation
r: Radius of Sphere
ρ = (0.5^2 + 1.5^2) / (2 \* π \* 5^2) = 0.0003